NASA Technical Memorandum 104542

Geodynamics Branch

Data Base for

Main Magnetic Field Analysis

R.A. Langel and R.T. Baldwin

April 1991

https://ntrs.nasa.gov/search.jsp?R=19910012340 2019-02-21T13:44:28+00:00Z
_L
NASA Technical Memorandum 104542

Geodynamics Branch

Data Base for

Main Magnetic Field Analysis

R.A. Langel

NASA-Goddard Space Flight Center

Greenbelt, Maryland

R.T. Baldwin

ST Systems Corporation

Lanham, Maryland

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, MD

1991

III.

IV.

V.

VI.

VII.

Vlll.

IX.

CONTENTS

INTRODUCTION .................................................

SURVEY DATA PROCESSING ......................................

A. Introduction

B. Along Track Filter Program

C. EQBIN Cleanup Process

MAGNETIC OBSERVATORY DATA BASE ...............................

SURFACE SURVEY DATA BASE .....................................

A. NGDC/BGS Survey Data Base

B. GSFC Data Base

AEROMAGNETIC SURVEY DATA BASE ................................

A. Project MAGNET Data

i. Background

2. Selected Data for 1952.5-1967.5

3. Continental U.S., 1976-1977

4. Data for 1980-1990

5. 1989 White Sands Survey

B. Canadian Aeromagnetic Data

i. Background

2. Data for 1953-1976

3. Data for 1983-1987

4. Caribbean Surveys 1984 and 1986

C. Other Aeromagnetic Data

MARINE SURVEY DATA BASE ......................................

A. Data for 1953,1958,1960-1987

B. Other Marine Data

SATELLITE AND ROCKET DATA SETS ...............................

A. Vanguard 3

B. Alouette

C. Woomera

D. Kosmos 49

E. POGO

F. Magsat

i. Early Data Sets for Field Modeling

2. The Basic Fit Data Sets

3. Small Subsets Selected For Equal Area Distribution

G. DE-2

I. Original Data

2. Processing Procedure

H. DMSP F-7

i. Background

REPEAT STATION DATA SET ......................................

ANCILLARY DATA ...............................................

ii

18

19

31

32

iii _'_C_ii_ PAGE BLANK NOT FILMED
X. NGDC SURVEY CATALOG ..........................................

A. The Catalog Format

B. Data Given a Source Code but not in Catalog

C. Survey Catalog

XI. FORMATS ......................................................

A. The NOAA Survey Format

B. New FIT Format

C. Survey Format for (old) FIT Program (EQBIN Output)

D. Binary (old) FIT Format

Original

Select

Correction

Gridded

Pseudo

E. Project MAGNET 1976-1977

F. Project MAGNET 1981-1989

G. Canadian Aeromagnetic Survey 1965-1976 (1/2 minute)

H. Candaian Aeromagnetic Survey 1965-1972 (Z component)

I. USGS Farnella (Puerto Rico)

J. C.G.S. Caribbean Survey 1984,1986; Artic 1980-1987; Canada

1980 - 1985

K. Japanese Aeromagnetic Data 1980

L. NOAA/NGDC Marine Survey Data Format

M. Processed Marine Data Formats

N. World Data Center Format

O. Old FIT Format (NOAA Format)

P. NOAA World-wide Repeat Data

Q. Kosmos 49

R. POGO

S. Loren Data Sets

T. DE-2 Data

Original

Processed

XIl. LIBRARY OF DATA FOR MAIN FIELD ANALYSIS ......................

A. Background

B. Library

C. Work in Progress

D. Library Maintenance

86

32

69

Xlll. REFERENCES .................................................... i00

iv
I. INTRODUCTION

The purpose of this catalog is to briefly describe the data sets used in

geomagnetic field modeling at the Goddard Space Flight Center (GSFC). Data

are measured and obtained from a variety of instrumentation and sources. In

order to avoid confusion, data sets from different sources were categorized

and processed separately. The data base is composed of magnetic observatory

data, surface survey data (which contains land, some aeromagnetic, some

total intensity marine, and three component marine data), high quality

aeromagnetic, high quality, total intensity marine data, satellite data,

and repeat data (Figure i). These individual categories of data are

described in detail in a series of notebooks in the Geodynamics Branch

(Table i.). This catalog reviews the original data sets, the processing

history, and the final data sets available for each individual category of

the data base and is to be used as a reference manual for the notebooks.

Table i. Summary of Data Notebooks

Data Type

Observatory

Ae romagne tic

Data Span

1820-1990

1950-1990

Marine 1953-1987

Land Survey 1900-1988

Satellite 1959-1990

Repeat 1900-1990

Notebook Contents

Plots of spline function fit, data formats,

description of processing programs, first

difference plots, world data distribution plots,

and comments on observatory station operations.

Data formats, description of processing, flight

line time and location information, world data

distribution plots, observed and processed data

plots.

Data formats, description of processing, flight

line time and location information, world data

distribution plots, observed and processed data

plots. See also Baldwin et al, 1990, Langel et al,

1990.

Description of processing programs, data formats,

world data distribution plots, microfiche of

processing runs and weighting histograms,

accounting of land survey contents, statistics

listing for source and bin numbers.

(incomplete) see technical memorandum (Langel et

al, 1990; Ridgway 1988; Ridgway et al, 1989).

(incomplete)

Each data type used in geomagnetic field modeling has varying levels of

complexity requiring specialized processing routines for satellite and

observatory data and two general routines for processing aeromagnetic,

marine, land survey and repeat data. Observatory and satellite processing

routines will be briefly addressed with references to more detailed

decriptions in technical memorandum and notebooks. The two general purpose

processing routines AVSIG and EQBIN will be described in detail in section

II. These routines are distinguished by the observed time information or

sampling rate associated with the data. Data with high sample rates (> 1

per 3 hour interval) are better suited for AVSIG, while data with lower

sample rates are best processed with EQBIN.
AEROMAGNETIC

SURVEY

DATA

Project Magnet

Canada

Japan

U.S.G.S etc.

I

GEOMAGNETIC

FIELD

MODELING

I

I

!

I

I

I

I

MARINE

SURVEY

DATA

Scripps

Lamont-Doherty

Woods Hole

U.K. etc.

SURVEY WDC-A I

DATA WDC-BI

I

I

REPEAT

STATION WDC-A

DATA WDC-B

MAGNETIC

OBSERVATORY

DATA

WDC-A

WDC-B

SATELLITE

DATA Kosmos 49

POGO

Magsat

DE-2 etc.

Figure i.

Following the processing description in section II, each data type is

decribed and its processing history explained in sections III - XIII. As

noted, the data base is separated into several catagories. The mainstay of

geomagnetic field modeling has been and will continue to be the magnetic

observatory data (section III). Additional survey data supplements the

observatory data by filling in areas of sparse geographic coverage. The

basic surface survey data set, described in section IV, was furnished by

the British Geological Survey (BGS) at Edinburgh, Scotland, and by the

National Geophysical Data Center (NGDC) at Boulder, Colorado. A summary

catalog of this data exists, and a printout of the catalog is listed in

section X. The data referenced in the catalog are subdivided by source.

Each source consists of one survey. The catalog is organized by source

number and tells the dates and locations of the survey as well as who

carried it out. A data source reference is also given when available. Also

given in section X is a summary of data which has a source code but no

reference in the catalog (this mainly stems from different forms of the

data set sent from NGDC and BGS). Separate survey data sets exist for

aeromagnetic, section V, and scalar marine surveys, section VI, which have

more detailed information and require AVSIG processing. Satellite data sets

are decribed briefly in section VII. Due to the complex processing history,

a detailed descr.iption of satellite data can be found in technical

memorandum or notebooks. Data from magnetic repeat stations have been

separated from the surface survey data and are considered as a separate

category, described in section VIII. In our case, repeat data have been
limited by uncertainty as to which sites have been exactly reoccupied.

When exact re-occupation seems certain, the data are treated as a separate

category, otherwise the repeat data are simply used as though they were

surface survey data.

Section IX summarizes the various quality control data (ie. Dst and Kp)

used for eliminating or weighting observations which have been measured

during periods of magnetic disturbance. In order to properly associate

quality control data with the magnetic data, magnetic data must have time

information accurate to within 1 hour for Dst and 3 hours for Kp. These

criterion are generally met when processing data with high sample rates

(AVSIG). Occasionally these surveys fail to record sufficient time

information for the inclusion of Dst or Kp. In these instances, a daily

average Dst or Kp value is determined and applied after EQBIN processing.

Data with lower sample rates, processed with EQBIN, rarely meet the Dst or

Kp criterion and are weighted or excluded from the data sets after EQBIN

processing using average daily Dst and Kp values.

The surface survey catalog (as mentioned) and the formats for all data

types are given in sections X and XI. The numerous formats listed in

section XI indicate the need for the scientific community, particularly the

world data centers, to adopt a consistent format for all standard data

products. Documentation and a listing of the main field data base library

are given in section XII. The unprocessed and processed data permanently

stored in the library are copied on magnetic cartridges with labels SU0000

to SU9999. The library was subdivided into contiguous sections for each

data type and further divided into original data, final processed data, and

working data sets. This organization makes the library manageable and

readily expandable and provides reference for the data processsing history.
II. SURVEYDATAPROCESSING

A. Introduction

The survey data (aeromagnetic, marine, surface survey, and repeat) are

processed by two methods dependent on sampling rate. These methods are

described in detail here because they are applied to 75_ of the data base.

The first, described in section B, was designed to filter aeromagnetic or

marine data along track reducing very large data sets (suitable for crustal

studies) into a smaller set (suitable for main field analyses) without

sacrificing the information needed for spherical harmonic modeling. The

result is a data set with crustal features attenuated by the filtering

process and with main field information retained. The second method,

described in section C, was designed to eliminate outliers from survey data

and to assign appropriate weights to that data. This procedure does not

depend on data being measured along track, but treats the data in batches

with either a commonsource or a commonregion of origin.

B. Along Track Filter Program

For surveys with a high sample rates and accurate time information along

track, the averaging program, called AVSIG, stored on IBM disk

XRIRB.MAGNET.PROGRAMS(AVSIG) and on cartridge SU9200is used to reduce data

volume and attenuate high frequency crustal noise, while maintaining

sufficient information to sample the core-produced field. It averages the

data along airplane or ship track, in track lengths of approximately 220

km, or 2 degrees.

The procedure is as follows: First, the data residuals are computed

relative to a preliminary field model. These residuals are then averaged

for a specified length of data along the track. For the marine shipborne

and aeromagnetic data, the program computes the distance traversed from the

survey starting point, and so the averaging interval is directly measured.

Gross outliers in the residuals (residual values greater than a specified

cutoff, typically i000 nT) are not included in the averaging process. Data

intervals with interior gaps greater than i0_ of the averaging length or

exterior gaps greater than 20Z of the averaging length are rejected.

l<p and Dst values are averaged along with the magnetic measurements. If an

interval of data has an average Kp greater than a specified cutoff level

20, then it is rejected. If magnetic measurementsare before 1957 or after

1985 (where digital Dst values are not yet available) a value of -i0 nT is

assigned to each interval. This will be changed to actual Dst values when

possible.

The position, time, and altitude corresponding to each average field value

are calculated also. Once the average residual value is obtained, total

magnetic field values are reconstructed by adding in the preliminary field

model at the average data position. This avoids the mistake of averaging

the non-linear core field change over the data averaging interval.

Data are output in new FIT format, to be described in section Xl.
The standard error was calculated for an estimate of the data variance. The

variance, 62j, is computed for each interval (where j is for the jth

interval). If individual data points were then used in the fit, 62j would

be a suitable estimate of the variance of each of the points in the jth

interval. However, we are compressing the data by computing the mean, #j,

in the filtering program. In this case, the correct estimate of variance

is 62@j = 62j/nj, where nj is the number of points in the jth interval.

62_ is called the standard error of the mean. The _j then becomethe data

input to the fitting program. Each @j "represents" nj actual data points.

C. EQBINCleanup Process for Survey Data.

A three step process which is suitable for data with low sample rates is

used for eliminating outlying points from survey data and for estimating an

appropriate standard error for each data point. This three step process is

culminated in a program residing in XRIRB.SURVEY.PROGRAMS(NEQBIN), herein

referred to as EQBIN.

For each 5-year interval, residuals of the survey data from the IGRFwere

formed. For declination (D) and inclination (I) all data with residuals

greater in absolute magnitude than 2° were flagged as anomalous; for H the

critical value of the residual was 300 nT; for X, Y, Z and B it was 600

nT.

In step one, the survey data are divided by source, each survey having an

identifying source number. Under the assumption that each survey is

relatively homogeneous,a statistical analysis was performed, by year (from

mid year to mid year), on the residuals of each survey to the appropriate

IGRFmodel. In each case the mean, standard deviation about the mean (6),

skewness (s) and kurtosis (k) were computed. Surveys with less than 12

data points were not included in this step. It was intended to use the

resulting 1/62 as the weight in the fitting process. However it was found

that often the distribution deviated considerably from normal and we wished

to modify the weight in someappropriate, albeit somewhatsubjective,

fashion. To this end a modified "standard deviation", 6', was computed as

follows:

(6') 2 = 6211 + aS - p(k-3)].

The reasoning behind this equation is, first, that skewness is a measure of

the departure from symmetry of a distribution: the difference between the

mean and the mode, measured in units of 6. The term as then reflects our

judgement that the mean of a skewed distribution should be viewed as

proportionately less reliable than the 6 indicates. Second. kurtosis

measures the degree of peakedness of a distributi_n, r_lative to a normal

distribution. Since k = 3 for a normal distribution, we used an adjusting

term proportional to (k-3). The result is that a highly peaked

distribution, k>3, will be treated as having less scatter than a normal

distribution while a broadened distribution, k<3, will be treated as having

more scatter. The factors a and _ were chosen to be 1 and .01,

respectively, after trying several values. Admittedly this is subjective,

but we consider it to give a more reliable weighting scheme than simply

using the usual u.
During this phase of the analysis, each data point whose individual

residual differed by more than 2o (not a') from the mean residual for that

survey was flagged as anomalous, except that for Project MAGNETand

Vanguard data a cutoff of I_ was used. The computation is then repeated

(step two), using only the non-flagged data, after which each non-rejected

data point was assigned the value of _' appropriate to its year and source

(a_).

The procedure is then repeated (step three) but now collecting together

data for each year and for each element into approximately equal-area bins

whose size was i0 o by i0 o at the equator. Surveys with less than 12 points

are now included. Only data not previously flagged as unreliable were used.

Each data point was also assigned the value of a' appropriate to its equalarea bin (_). In this step no data are rejected.

During the fitting procedure the weighting goes as follows: each survey

data point is assigned a weight of i/_, where _m = max(a_,a_), see e.g.

Langel et al. (1988).
III. MAGNETICOBSERVATORYDATABASE

World-wide observatory data are the mainstay of surface data used in main

field modeling. The data used are the annual meanvalues for each

observatory, computed on the half year and furnished to us by the NGDC.If

data for less than a full year are available the average time of the data

is computed instead. The processing performed on the observatory data

before they are used in main field modeling is described in detail in a

series of notebooks. All magnetic observatory processing programs can be

found on the partitioned data set XRIRB.OBSERVO.PROGRAMS and are

permanently stored on cartridge SU9000. The following series of programs

are used to update the existing observatory files with new data.

Observatory data sent from NGDCare reformated to a modified "old" FIT

format (section XI) which contain the year in F8.3 format instead of F6.3,

and any station namewhich differs from our standard station names are

replaced by program (REFRMNEW). A complete list of station namesare found

in the observatory notebooks. Duplicate records are removedand station

names alphabetically sorted using programs (DUPYRNEW) and (RUNSORT).

Station breaks are determined by i) fitting a spline function through the

observatory values to determine outliers using program (SFIT) and 2) by

computing the first differences of the remaining observatory values using

(JCLFIRST) and (FIRSTDIF). By assessing first difference and spline fit

plots, station breaks are assigned manually. Station breaks are located at

times of data jumps within a station that are known to have physical

causes, such as a new magnetometer, or a change in location, or they may be

located at breaks in the first difference plots (eg. see notebooks).

Station breaks are denoted with Romannumerals, for example ALIBAGI,

ALIBAGII etc. Stations with the samenamebut with different numerals are

treated as different stations by the new FIT program. Program (ADDEND)adds

the station break designator (ie. I,II etc.) on to the station name. The

observatory station names are sorted again alphabetically and then by year

for each station with program (RUNSORT).Programs (MERGEA)and (MERGEB)

merge the new data with the old observatory data, and program (NEWFIT)

reformats the data into new FIT format. As of 6/90 the entire observatory

data set was reprocessed (all data from 1820-1989). Several new programs

are (OBSOUT)which flag the user specified outliers and (OBSSIG)which

computes sigmas for each observation from a spline fit to each station and

reformats the data into new FIT format. Another new program is (BIASGLB)

which reads observatory biases from the new FIT global file. Observatory

biases are linear adjustments made to each observatory. These are computed

from the difference between the observations at each station and the

computed field. They also allow for adjustments in the field models for

stations with station breaks, thus giving spherical harmonic coefficients

which are more representative of the secular variation. Figure 2.

summarizes the processing necessary for the observatory data sets.

Original observatory data are stored on cartridge SUO000.Processed

observatory values are stored on cartridge SU0500. This cartridge will also

contain observatory bias values in the future.
REFRMNEWI

I DUPYRNEWI

RUNSORT I

SFIT IFIRST DIFFERENCESI

I

I

RUNSORT I

I

I ASSESSMENT I

MERGEA

I MERGEB

I NEWFIT I

I

I OBSOUT I

I

[ OBSSIGI

Figure 2.

8
IV. SURFACESURVEYDATABASE

A. NGDC/BGSSurvey Data Base.

World-wide survey data stored at the NGDCand BGScontain approximately

180,000 data points. The basic survey data bases maintained by NGDCand BGS

should be the same, but are not. The data from the NGDCwas cleaned up by

David Barraclough at the British Geological Survey (BGS). The cleanup

process consisted of deleting duplicate data and flagging outliers. These

data were sent to GFSCon two tapes SURVEYand SURVYIwhich are ASCII

standard labeled and must be read on the VAXII/780. The format for these

data sets are in NOAAsurvey format. The data base spans from 1900.0 to

1987.5 and is divided into files of 5-year intervals (ie. 1912.5-1917.5 =>

SDATI5). The blocking parameters on tape SURVEYwere in error for the files

containing SDAT55,SDAT60,SDAT65.Tape SURVYIcontains these files.

Additional data were sent from BGSon a 3.5 in. diskette titled NEWSVY.DAT.

This contained repeat data from 1977-1989 and Japanese aeromagnetic data

for 1984-85.

B. GSFCData Base

The surface survey files cleaned up by BGSand the file NEWSVY.DATwere

combined and further cleaned up by removing duplicate records using

programs XRIRB.SURVEY.PROGRAMS(DUPLIC). In addition, surveys duplicated in

the marine data set were deleted from the survey data set. These have the

following source numbers: 543, 552, 576, 605, 656, and 658 (see Marine

Survey Data Base below). Project MAGNET(source 500), Canadian aeromagnetic

(source 501), and Vanguard, Allouette, and Woomerasatellite (source 502)

data were also treated separately and were not included in the surface

survey data base. These surveys are present with the surface data in the

NGDCdata base but are kept separate in the BGSdata base. Japanese

aeromagnetic data for 1975 (source 748) and 1984-85 (source 842) have been

left in the survey data set until time information (accurate to < 3 hours)

is obtained to allow for AVSIGprocessing. Source 900, the Soviet survey

data, was on files SDATS0,SDAT55,and SDAT60but not on SDAT45.This data

was added from XRTJS.SRV.USSR.DATAwhich contains data from 1945, 1950, and

1955. The survey data files are located on disk under XRIRB.NEW.SDAT05.DATA

(etc.) and on cartridge SUI000 (see section XII.). Repeat data have also

been removed from the surface survey data set and are discussed in section

XIII.

At this point all of the duplicate records and unwanted surveys have been

removed from the data base, however there are duplicate data in time and

location still present (ie. data with different observations but the same

time and location). Each file was seperated into a _il_ with no time and

location duplications (SDAT05.DATAetc.: cleaned) at_da file of duplicates

(SDAT05Q.DATAetc; questionable). These files are stored on SUI002. The

cleaned up files were processed with EQBINas described in section II. The

final cleaned up versions are GDAT05.GI2#89etc. and are on cartridge

SUI500 (see Figure 3.). A detailed description of processing and output is

documented in a notebook for the survey data set. World data distribution

plots of the final data sets, output and histograms from EQBINin

microfiche form, and listings of the number of data observed for each data

type and source number are also contained in the notebooks.
NEW.SDATXX.DATA

(BGS)

cleaned-up

SDATXX.DATA

(GSFC)

cleaned-up

SDATXXQ.DATA

(GFSC)

questionable

EQBIN

GDATXX.GI2#89

(GSFC)

final data

set

REPEAT DATA

see section

VIII

Figure 3.

i0
V. AEROMAGNETIC SURVEY DATA BASE

A. Project MAGNET Data

1. Background

The descriptive information regarding these data is taken from the NO0

Reference Publication, RP-23 (Basset,C.H., 1982).

Project MAGNET was initated in 1953 to conduct airborne magnetic surveys on

a global basis. "From 1953 to 1972, vector airborne geomagnetic

measurements were made by a Naval Surface Weapons Center (formerly Naval

Ordnance Laboratory) fluxgate Vector Airborne Magnetometer (VAM-2). Total

magnetic intensity, inclination, and declination were determined to the

following accuracies: 515 nanoteslas (gammas), 50.1 degrees, and 50.2

degrees. To reduce the effects of aircraft motion, angular measurements

were averaged over a I00 second time period centered on each 5 minute GMT.

The observed data were recorded on continuous analog strip charts.

b_avigational accuracy was 55 nm (nautical miles). Beginning in 1964, the

survey aircraft was equipped with a digital magnetic tape recording system

which sampled and recorded the data at a one sample per second rate; and in

1965, an optical pumping metastable helium magnetometer system was operated

during special aeromagnetic surveys. This magnetometer system was towed

approximately i00 feet behind and i00 feet below the survey aircraft and

measured only the total magnetic intensity."

"Since 1973, navigational and geomagnetic data have been collected on board

the Project MAGNET RP-3D aircraft using the Geomagnetic Airborne Survey

System (GASS). Both vector geomagnetic measurements and scalar magnetic

measurements have been made with a Honeywell Vector Fluxgate Magnetometer

and the optical pumping metastable helium magnetometer system,

respectively. The navigational sensors include a Loran C, Omega,

Navigational Satellite, and an electrostatically suspended gyro inertial

navigator. The vector magnetometer is located in the magnetically clean

cabin of the aircraft, and the scalar magnetometer is located in the tailboom section."

"Magnetic data accuracies obtained with the GASS system are inclination, 57

arc minutes; variation, 56 arc minutes; horizontal intensity, 55

nanoteslas; vertical intensity 55 nanoteslas; and total intensity, 51

_anotesla."

"Navigational equipment used on the aircraft and their accuracies are

Navigational Satellite (ARNNS) _0.5 nm; Loran C (ARm-98) @0.25 nm; inertial

navigation, (ASN-84 and ASN-101) 1.0 nm/hour and o.i nm/hour respectively.

The GASS system overall positional accuracy is _i nm for high-level

worldwide vector geomagnetic surveys and _0.25 nm for low- level magnetic

surveys."

As a result of a phone conversation with John Quinn of the NO0 (8-494-4250,

8/8/88) the following was determined:

a. Data from the '50's to early '70's were largely strip chart traces.

These data were digitized at 5 minute intervals and are available through

the NGDC at NOAA; these are called the SP66 data file.

ii
b. During the 70's (Viet Nam) high level surveys were not flown, only low

level total intensity surveys. These data are not generally available,

except upon special request. (A catalog of the areas surveyed from the

early 1950's through 1982 is located in the Geodynamics Branch (Code 921).)

c. In 1980 high level surveys suitable for field modeling data were

restarted. The basic sampling rate is 4/sec.

The following sections describe the Project MAGNET data which we currently

(2/91) have processed for the main field data base.

2. Selected Data for 1952.5 - 1967.5

As part of the derivation of the DGRF models for 1955 and 1960, the BGS

sent us their cleaned up project MAGNET data files in NOAA format (section

XI). Data for 1952.5 to 1957.5 was copied to reel DT0035 and cartridge

SU2012. Data for 1957.5 to 1962.5 was copied to reel DT0087 and cartridge

SU2012, and data for 1962.5 to 1967.5 was copied to reel DT0021 and

cartridge SU2012.

Because of insufficient time information (time resolution no better than 3

hours, see introduction) , each of these data sets were processed through

the cleanup process (Program EQBIN) described in section II. The resulting

cleaned up files, with assigned weights for the fitting process, are:

XRIRB.MDAT55.GI2#89, XRIRB.MDAT60.GI2#89, and XRIRB.MDAT65.GI2#89. These

files are in new FIT format and are on SU2600.

In the cleanup process the gross outlier limits were 2 ° for D and I, 300 nT

for H, and 600 nT for X, Y, Z, and B. The statistical outlier test

rejected data more than la from the mean of the source. Plots of the data

locations for the five year time spans and statistics generated are listed

in the Aeromagnetic notebook.

3. Continental U.S., 1976-1977.

These data are from a special survey of the U.S. The original survey

included both vector and scalar data, but there were severe problems with

the vector data so only the scalar data are published. The data were copied

onto reel 0F0948 and cartridge SU2000. There are approximately 650,000 data

points. The record format is listed in section XI. The survey was flown at

altitudes between 0.9 and 1.6 km with a sampling interval of one per second.

The data were processed with the program XRIRB.MAGNET.PROGRAMS(AVS7677), a

modified version of (AVSIG). The processed data are documented in the

aeromagnetic data notebook and reside on disk XRIRB.MAGNET.AVDATA.GI2#89 and

on cartridge SU2600. The averaging interval was 220 km reducing the data set

to 480 points.

4. Data for 1980 - 1990

Project MAGNET data for this time interval are composed of three groups;

high density data, preliminary high density data, and decimated data. Our

goal is to process all available high quality, high density Project MAGNET

data. This will result in the eventual replacement of any preliminary or

decimated data. There exists in the high density and decimated data sets

12
sent to us from NGDCand NO0duplicate flights. Of these, only the high

density data were processed with AVSIG.

i) High Density

Selected Project Magnet flights covering altitudes of 1.5 to 8 km with

sampling rate at 1 per 2 seconds have been obtained from NO0for the period

1981 - 1985. The format for these data are listed in section XI. The data

for 1981 is on reel DT0045with ii files and on cartridge SU2002with ii

files. Someof the 1982 data are located on reel DT0047with ii files and on

cartridge SU2002on files 11-22. The remaining 1982 data are on reel DT0048

and on cartridge SU2004. The data for 1983 are on reel DT0046and cartridge

SU2006. The data for 1984-85 are on reel DT0279and cartridge SU2008(files

1-15 are from 1984; files 16-18 are from 1985).

Additional data for the period 1987-1989 not present in the NO0decimated

data set (see below) but included with NGDCcurrent (2/91) data are found on

cartridge SU2016(42 files).

All these data were processed with program XRIRB.MAGNET.PROGRAMS(AVSIG). Dst

values were added later with program XRIRB.FITFIL.PROGRAMS(DSTADD). Averaged

measurementswith Kp values > 2+ for 1986-1989 were excluded using program

XRIRB.FITFIL.PROGRAMS(NEWKP). Output data for 1981-1985 are in new fit

format on file XRIRB.MAGNET.AVDATA.GI2989 and on cartridge SU2600(file 5).

NGDCdata 1987-1989 are in new fit format on file XRIRB.MAGNET.AVDATA.G08#90

and on cartridge SU2600file 6.

Muchof the Project MAGNETdata for the 1980's are in a decimated data set

processed by NO0. These samedata in undecimated form are also available at

NGDCand will be obtained and processed with AVSIGin the near future.

ii) Preliminary High Density

Preliminary data for 1988-1989 has been acquired from NO0and is stored on

cartridge SU2018(41 files). These data are in new FIT format on file

XRIRB.MAGNET.AVDATA.YR8790C. After processing, this data contained large

measurementerrors due to incomplete processing at NO0. Flights with such

errors were not used. Someflights scalar measurementswere used in place of

suspect vector data. The preliminary NO0data was not stored on cartridge

owing to large fluctuations in scalar and vector measurements. These data

will be reprocessed when the final data becomesavailable.

iii) Decimated

A special data set from the 1980's with world-wide coverage was assembled by

NO0in 1989 with altitudes above 20,000 ft and a _ample rate of 1 point/200

sec. These data are on reel DT0295and on cartridge SU2014and were

processed with program XRIRB.MAGNET.PROGRAMS(AVHILE), a modified version of

(AVSIG). The 1264 averaged points are on disk XRIRB.MAGNET.AVDATA.G01#90 and

on cartridge SU2600. As mentioned, the undecimated data at NGDCfor these

flights will be prcessed with AVSIGto replace the decimated data set.

5. 1989 White Sands Survey

13
In March of 1989, a special Project MAGNET survey was flown over the White

Sands Missile Base for the Strategic Defense Initiative field model

(Langel, et ai.,1990). There were approximately 60,000 measured

observations each with X, Y, and g components which are stored on reel

DT0282 and on cartridge SU2010. The record format is NO0 described in

section XI. This data were processed with program

XRIRB.MAGNET.PROGRAMS(AVSIG2) resulting in roughly 364 averaged data values

for each component. For this case, (AVSIG2) calculated an averaged point

every i/2 ° with the constraint that each computed component must fall

within one standard deviation of the observations for the entire flight

line or be flagged as an outlier. These data are stored on disk

XRIRB.MAGNET.AVDATA.WS89.

For general field modeling, one flight line of the White Sands survey was

processed again with average points calculated every 2 °. This was done to

prevent overemphasizing the survey in standard models. These data are

stored on disk XRIRB.MAGNET.AVDATA.GI2#89 and on cartridge SU2600.

B. Canadian Aeromagnetic Data

i. Background

Aeromagnetic measurements over Canada, the Arctic, Greenland, Scandinavia

etc., have been carried out by the Division of Geomagnetism of the Earth

Physics Branch of the Department of Energy, Mines and Resources (formerly

the Dominion Observatory) since 1953. A brief description of these surveys

is given by G.V. Haines, 1982. Much of the following information comes from

this report. Also useful are a series of Energy Mines and Resources

reports by G.V. Haines and W. Hannaford (1972, 1974, 1975, 1978, 1980).

"The Earth Physics Branch, Ottawa, conducted fifteen 3-component

aeromagnetic surveys between 1953 and 1976. Almost 500,000 km were flown

in nine surveys from 1953 to 1963, nearly covering Canada twice. Digital

data from these surveys comprise 11,500 5-minute vector averages. More

than 600,000 km were flown in six surveys from 1955 to 1975, covering

Canada, the Nordic countries, and the Greenland and Norwegian Seas.

Digital data comprise 120,000 1/2 minute averages."

"Errors in aeromagnetic data come from incorrect instrumental calibrations,

from incomplete aircraft field corrections, and from unknown time

variations of the geomagnetic field. Instrumental calibrations and

.=ircraft field corrections that are assumed to be constant with time are

determined on the basis of calibration flights, although the corrections

can be confidently applied only to field values similar to those of the

calibration area. Aircraft-field corrections that change with time have

been applied, in recent surveys, to the vertical intensity based on a

comparison of total intensity from a fluxgate magnetometer inside the

aircraft with that from a proton magnetometer outside the aircraft.

Corrections to declination for improper sextant levelling must be made when

the celestial body being observed is not near the horizon. Although no

corrections are made for diurnal variations, minor disturbance fields, or

ring current effects, data are accepted only when the field at nearby

observatories lies within a lO0-nT band over a time interval of 3 hours or

more." (Haines, 1983)

14
2. Data for 1953-1976

The Canadian surveys are divided (Coles, personal communication) into Phase

i and Phase 2. Phase i comprise the data prior to 1965; Phase 2 after

1965. In 1965 the aircraft platform was replaced along with the

instrumentation. The 3- component fluxgate was updated and a proton

precession magnetometer was installed in a 3.5 meter boom at the end of the

aircraft. The addition of the proton magnetometer provided high accuracy

total field measurements from outside the aircraft. These measurements

were generally taken at an altitude of 3.5 km above sea level, or greater.

List of Phase 2 Surveys:

1965 9/13-11/16 Denmark, Norway, Sweden, Finland, Greenland,

1969 Feb-March British Columbia and Northeastern Pacific

1970 late Canadian Arctic

1972 10/24-12/22 Saskatchewan, n.e. Alberta, Yukon, Mackenzie

1974 late Ontario, Manitoba, Keewatin, parts of Quebec

1976 late central and eastern Quebec, Davis Strait

Our data files include:

i. Reel DT0153 and cartridge SU2202, File i, which contains data from

1953.677 to 1969.216, i.e. probably through the British Columbia Survey.

This file also contains Vanguard, Alouette and Woomera data. These data are

in the standard NOAA format for survey data.

2. Reel DT0257 was received from the NGDC in mid Sept., 1988. The NOAA

Master Tape number is W03688, Archive Tape number is W01707, and Customer

Tape number is TG0-0100 for file I and TG0-0110 for file 2. This reel was

copied on to cartridge SU2204. File i is the set of 5 minute averages from

all the Canadian Surveys except for data from 1972, i.e. from the survey of

Western Canada: Saskatchewan, n.e. Alberta, Yukon and Mackenzie in NOAA

format. File 2 is the 1/2 minute averages from the Phase 2 surveys,[i.e.

1965-1976 (See format in section XI)].

3. Reel 0F4287 and cartridge SU2206 from Richard Coles contain 6 files of Z

data covering Scandanavia, 1965, Greenland/Norwegian Sea, 1965, Iceland,

1965, British Columbia, 1969, Arctic, 1970, and the Canadian Prairies,

1972. This data was upward continued and used with the POGO data set in

Langel and Coles (1980) (See format in section XI).

Phase i data (1953-63) was processed with program EQBIN in three parts for

D, H, and Z components. Outlier limits were 2o for D, 300 nT for H, and 600

nT for Z. The final data sets are: XRIRB.CANADA55.GI2#89 (1953-54),

XRIRB.CANADA60.G12#89 (1959), and XRIRB.CANADA63.GI2#89 (1963). These data

_ets are stored on cartridge SU2602 labels 2, 3, and 4.

15
The 1/2 minute (averaged) Phase 2 data (1965-76, file 2 from SU2204)was

processed with program AVSIGfor D, H, and g components. The outlier limits

were +-90° for D and +-500 nT for H and Z. The large outlier limit for D

results from flight lines passing over the magnetic pole. Although the

total field was also measured, it was not used due to the small discrepancy

between the measured and computed values. The final data sets are stored

on files 5, 6, and 7 on cartridge SU2602. These files cover 1965 and 1969:

XRIRB.CANADA.AV65.GI2#89; 1970, 1972, and 1974: XRIRB.CANADA.AV70.GI2#89;

and 1976: XRIRB.CANADA.AV75.GI2#89.The declination fluctuates for several

flight lines in 1965, 1970, and 1974 where flights pass near the pole. All

of the above final data sets are in new FIT format.

3. Data for 1980-1987

Aeromagnetic data for 1980-1985 from the National Research Council of

Canadaare stored on tapes UT2577, UT2936, UT761U,UT773U, UT2485and on

cartridge SU2208. These data were processed with program XRIRB.MAGNET

PROGRAMS(AVSIGCAN) and stored on file XRIRB.CANADA.AV8085.G08#90. Due to

the large Kp values observed during these flights manyof the averaged

points were deleted during program execution.

Additional Artic flights from 1983-1987 were obtained in March of 1990 from

the National Research Council of Canada. The raw data are stored on SU2210

files 1-17 and on reel UT2491files 1-17. The data was processed with

program (AVSIGCAN)with Kp and Dst set to 0.0 and -i0.0 respectively for

years after 1985 (where Kp and Dst are not yet available). The processed

data are stored on disk XRIRB.CANADA.AV87.G03#90and on cartridge SU2602

file 9. The flight lines were flown at about 305 m.

4. Caribbean aeromagnetic survey

The Canadian Geological Survey conducted aeromagnetic surveys of the

Caribbean in 1984 and in 1986. Reel DT0039and cartridge SU2200contain

only the data flown in 1984 which comprise 14 flight lines of scalar data.

No altitude information was specified, but Peter Hood indicated that the

aircraft maintained an altitude of 305 m during the survey. Data from

1984.836 to 1984.871 was processed using the along track averaging program

(AVSIGCAN)which condensed the entire data set into 13 points. The averaged

data in new FIT format are on XRIRB._GNET.AVDATA.GI2#89and on SU2600.

The Caribbean data for 1986 are stored on cartridge SU2210files 18-38 and

on ASCII reel UT2844file 1-21. The data were processed with program

(AVSIGCAN)with Kp and Dst values of 0.0 and -i0 respectively for data

after 1985 and stored on disk XRIRB.CANADA.AV86.G03#90and on cartridge

SU2602. These flight lines were flown at 305 m an_1_',_v_rparts of the

Caribbean Sea, Gulf of Mexico, and Atlantic _ean.

C. Other Aeromagnetic Data

1. The East Coast Aeromagnetic Survey flown from 1974 to 1976 is stored on

reel 0F8303. These data contain no time information and are not used.

2. The Japanese have conducted aeromagnetic surveys of the islands and

their surrounding oceans for 1975, 1980, and 1985. The data for 1980 have

16
approximately 20 flight lines and are stored on reel DT0261 and cartridge

SU2400. Data for 1975 and 1985 are found in the survey data sets in SDAT75

and SDAT85 with source numbers 748 and 842. The data for 1975 and 1985 have

limited time information and were reduced using EQBIN, however data for

1980 were found to be suitable for AVSIG processing. The processed files in

new FIT format are stored on XRIRB.JAPMAG.GI2#89 and on cartridge SU2602.

The aeromagnetic data for 1975 and 1985 will be processed through AVSIG

when accurate time information becomes available.

3. Aeromagnetic data measured by the Naval Research Laboratory over the

Chilean Ridge in 1/90 was stored on SU2018 files 42-51. After processing

with AVSIG, records measured during times where Kp > 2+ were removed by

hand (no digital Kp information available). The new fit formated file is

XRIRB.NVLRES.AVDATA.G08#90 stored on SU2600 file 7.

17
VI. MARINE SURVEY DATA BASE

A. Data for 1953,1958, 1960-1987

The processing of the world data base of marine scalar magnetic data was a

major task completed by personnel at GFSC and the NGDC. The data set

covered the years 1953, 1958, and 1960 - 1987 and contained over 13 million

observations. The data from the NGDC archive were processed with program

(AVSIG). This involved averaging the data along track in 220 km segments

into one value. The program also calculated an average Kp value; if the

average Kp was greater than a specified cutoff (2+), then no average

reading was output for that point. The averaging program also added an

average Dst value to the data. The processed data files which includes an

output file, an averaged output file, a non-averaged plot file, and an

averaged plot file were sent from NGDC to GSFC for plotting and

reformating. These data are stored on cartridges SU3000, SU3002, and

SU3004. The reduced data set for main field modeling contains approximately

24,243 points and is stored on disk file XRIRB.MARINE.AVDATA.GI2#89 and on

cartridge SU3500. A complete description of this analysis can be found in

the marine data notebooks at GSFC and a summary in Langel et al.,(1990a).

B. Other Marine Data

Other marine data processed with AVSIG include a survey conducted by the

USGS in late 1985 south of Puerto Rico. The raw data are stored on

cartridge SU3004 file 4 and on reel DT0200 and were reduced to a average

point every 220 km. The reduced data are stored on disk

XRIRB.MARINE.AV85.G02#90 and on cartridge SU3500 file 2.

18
VII. SATELLITE AND ROCKET DATA SETS

A. Vanguard 3

Vanguard 3 made absolute measurements of the magnetic field with a Proton

Precession Magnetometer from September 18 to December ii, 1959. Data were

acquired in real time only, i.e. when the satellite was in sight of a

Minitrack station. These stations were located at Ft. Myers, Florida,

Woomera, Australia, Quito, Equador, Lima, Peru, Antofagasta, Chile,

Santiago, Chile, Antigua, British West Indies, Chula Vista, California,

Blossom Point, Maryland, and Johannesburg, Union of South Africa. A

description of the experiment and a catalog of data are given in Cain et

al. (1962).

These data are located on disk XRIRB.VANGRD.DATA and on cartridge SU5000

file 1 and SU2202 (after the Canadian survey data) in standard NOAA survey

data format.

For cleanup and assignment of fitting weights, these data were processed

with (EQBIN). In this case the B gross outlier tolerance level was i00 nT

and the tolerance level was lo. The final EQBIN cleaned up data set is

XRIRB.VANGRD.GI2#89 on cartridge SU5500 file 4 in new FIT format and

contains 3872 measurements. The statistics from EQBIN are summarized in the

satellite data notebooks.

B. Alouette

Among other things the Alouette satellite measured the electron gyro

frequency from which the ambient magnetic field can be inferred. Gyro

frequency values were furnished and converted to magnetic field values.

The data epoch is 1962.874; the data are on cartridge SU5000 file 2 and

SU2202, and on disk file XRTJS.ALOUETTE.CLEAN.DATA. These data are in the

standard NOAA survey data format.

Data were processed through the EQBIN cleanup process resulting 184 points

output to XRIRB.ALOUETTE.GI2#89 and cartridge SU5500 file 5 in new FIT

format. The gross outlier limit was set at 600 nT. The statistical outlier

limit was set to reject data more than 2a from the mean of the source. The

mean and sigma shown in the satellite data notebook seem to indicate that

this is not a particularly reliable data set.

c. Woomera

Magnetic data from a single rocket flight: epo_:h _964.191: location about

120 ° colatitude, 136 ° longitude. 76 data point_ a,_ _,n _artridge SU5000

file 3 and SU2202 and disk data set XRTJS.WO0[IERA.CLEAU.DATA. These data

are in the standard NOAA survey data format.

To check the data set validity, data were processed through the EQBIN

cleanup process resulting in disk data XRIRB.WOOMERA.GI2#89 found on

cartridge SU5500 file 6 in new FIT format. The gross outlier limit was set

at 600 nT. The statistical outlier limit was set to reject data more than

26 from the mean of the source. The statistic for this data were contained

in the notebooks.

19
D. Kosmos 49.

The following description is taken from "The Survey with Cosmos-49" by

Benkova (1971).

"The satellite was launched into an orbit with inclination 49 °, perigee 260

km, and apogee 490 km. The orbit precessed westward at a rate of 4.5 ° per

day." "The measurements were made each 32.76 seconds during the interval

October 24 to November 6 in 1964, a magnetically quiet period." The

satellite had onboard memory so the coverage was global, equatorial of 49 ° .

"Two proton precession magnetometers were orthogonally mounted in the

satellite...the time of the measurement is uncertain to _0.5 second. The

magnetometers are mounted 3.3 meters from the center of the satellite,

whose magnetic effects are compensated to an accuracy of 2 7 by an array of

permanent magnets producing a homogeneous compensating field at the sensor

locations ..... In addition to the uncertainty of T0.5 second earlier

discussed, errors in satellite position existed that could reach 3 km in

the direction of the flight path and 1 km in altitude as well as in the

direction of the normal to the satellite orbit. Random errors due to

unfavorable orientation of one of the magnetometer sensors were rejected."

"The usable scalar intensity values totaled 18,000 and were published in

catalogue form."

The basic Kosmos data set is contained on reel DT0246 and on cartridge

SUS000. This tape file was converted to the standard NOAA survey data

format and stored in the disk file XRTJS.KOSMOS49.DATA and on cartridge

SU5000 file 4. To check the data set validity, they were processed through

EQBIN cleanup process resulting a cleaned up data set, in new FIT format on

XRIRB.KOSMOS49.GI2#89 and on cartridge SU5500 file 7. The gross outlier

limit was set at 600 nT. The statistical outlier limit was set to reject

data more than 2a from the mean of the bin. This data set is discussed in

the satellite data notebook.

E. POGO

The SELECTED POGO data set is a collection of observations made by the OGO2, -4, AND -6 satellites. Three subsets of data were selected.

I. DSN=POG246, (DSN - data set name for SL standard label tapes) with 54K

measurements selected from quiet times between 1964 and 1971. The bulk of

this data set is comprised of 47384 observations which were used to derive

the POGO(2/72) field model (Langel et al.. 198o>. A<I<I_<I t,_ this were OGO-6

magnetic field values taken from intervals fLom 1969-1971. Desired time

intervals were selected from quiet (_B<I0nT) and moderately quiet

(10nT<AB<30 nT) periods of magnetic activity.

2. DSN=POGCQ, with 94K measurements selected from quiet OGO-6 data during

1970 and 1971.

3. DSN=POG6MQ, with 24K measurements selected from moderately quiet OGO-6

data during 1970 and 1971.

2O
The "master tape" for these data is MAG001;file I is POG6CQ,file 2 is

POG6MQ,and file 3 is POG246. These data are stored on cartridges SU5002

and SU5003. Each data point is tagged with time, latitude, longitude, a

satellite identification number and the Dst value. The tape format can be

found in secton XI. 0F3104 is possibly the predecessor to MAG001. It seems

to be a one file tape with all the above described data but with no Dst

values. These data are stored on file 4 of SU5002and SU5003with

DSN=OF3104.These data sets are not in the new FIT format and contain no

weight values from processing. Weight information must be assigned in the

field modeling routine or in seperate processing.

F. Magsat

i. Early Data Sets for Field Modeling

One of the first data subsets was a selection of scalar and vector data for

15 magnetically quiet days (November5, 1979 - April 20, 1980). The data

for each day was further culled from specified time intervals (see the

Table) judged to be relatively undisturbed. These data are in the Binary

Fit Format (unmodified) and are contained on on cartridge SU5004and on

tapes 0F8029, 0F8030 and 0F7514; data for each day are written on a

separate file: 9 track EBCDIC,standard labeled, DSN=TD5821,VBS,

LRECL=II200, BLKSIZE=22404.

FILE DATE

i Nov 5, 79

2 Nov 6, 79

3 Dec 13, 79

4 Dec 25,

5 Jan 9, 80

6 Jan I0, 80

7 Jan 18, 80

8 Jan 19, 80

9 Feb 12, 80

i0 Feb 13, 80

ii Mar 3, 80

12 Mar 15, 80

13 April 18, 80

14 April 19, 80

15 April 20, 80

TIME INTERVALS(HHMMMSS)

5000-10400; 105753-112920; 115300-121700; 232820-

3000-92000; 102450-110350; 112000-114300; 115843-

0-54000; 105200-120000

0-4800; 13000-61000; 103600-110000; 121000-123300

2500-55000; 114835-121140; 155000-165000; 173000-

11500-34000; 72500-95500; 110000-112100; 115200-

3000-6000; 13800-15300; 112800-115100

22700-70000; 103600-110700; 112500-124000; 224000-

0-64000; 101000-112100; 150000-190000; 231300-240000

4600-11700; 20000-90000; 130000-152000

3700-10800; 14600-71800; 111000-115600; 122000-

3200-73000; 110500-121400; 160000-202000

43000-90000; 171000-181000

4600-10900; 15500-54500; 114400-115900

53500-91500; 12000-130500; 180500-190500

The next data set was derived by adding three day_ _ data to the above:

Nov 28, 79

Mar 2, 80

Mar 12, 80

12500-24500; 30000-55000; 61000-72000; 74500-90000;

4200-10500; 30000-41500; 44000-64000; 65400-81600;

3100-90000: 94500-123700: 125800-170500; 171200-

The resulting data set consists of 30,700 scalar and vector componentdata

for the 18 quiet days, globally selected for areal uniformity. The

21
resulting data was fit with individual models in which the attitude biases

and external fields were solved for, as follows:

DATE o of External Field

Fit (eI , e2, e3)

nT nT

Attitude Correction

(Roll, Pitch, Yaw)

arc sec

11/5/79 i0

11/6/79 5

11/28/79 7

12/13/79 i0

12/25/79 i0

12/9/79 15

1110180 15

1/1818o 15

1/19/80 15

2/12/80 i0

2113180 8

3/2/80 8

3/3/80 8

3/12/80 8

3/15/80 5

4/18/80 20

4/19/80 20

4/20/80 20

25.9

20.9

20 5

13

8 5

22 5

22 5

23 2

23 2

17.

17.

16.

14.2

11.9

9.3

22.2

22.2

22.2

-1.5

-1.5

-1.5

-1.7

-0.5

2.4

2.4

2.7

2.7

1.5

1.5

0.6

-0.7

0.9

-1.4

0.3

0.3

0.3

-0.6

-0 6

-0 6

-3 1

-0 3

-4

-4

0 2

0.2

-2.9

-2.9

-3 .i

-2 8

-2 7

-I 5

-4 3

-4 3

-4 3

4

4

29

-ii

4

7

7

5

5

-26.

-26.

-19.

-22.

-37.

-35.

-67.

-67.

-67.

-4

-4

-i0

-9

-22

-9

-9

-20

-20

-7

-7

-3.

-8.

-5.

-3.

-14.

-14.

-14.

-14.

-14.

--7.

18

21

35

35

53

53

94

94

77

94

84

79

87

87

87

After correction for these external fields and attitude biases, the data

were sorted within each i0 ° x i0 ° global area by time. The following

algorithm was then used to obtain a more uniform areal and temporal

coverage.

(1)

(2)

(3)

Vector component data are cut-off at _50 ° latitude.

A relative precision measure (the standard deviation of a leastsquared fit to each quiet day) is assigned to the data for each day,

as given in the above table.

A maximum number of points is established for each i0 ° x i0 ° area by

specifying the number at the equator and applying the cosine of the

latitude of the mid-point as a factor in each i0 ° x i0 ° area block

(a) Vector-- for each individual component the equatorial number is

set at 30 points per i0 ° x I0 ° block. The time sorted data for

that component are then examined relative to the allowed number

for that particular i0 ° x I0 ° block. If the total number of

data are less than the desired number, then all data are taken.

If the total data are greater than the p_iurs requested for the

I0 ° x i0 ° block, data are selected by 3kipping through the total

data set at a prescribed interval. If the resulting data set is

still too large, they are sorted by the relative precision

measure and truncated at the desired number of points. The data

sets are biased in favor of November 6 and March 15 by not

allowing the algorithm to skip through observations for these

days.

(17) Scalar -- the scalar data are processed similarly to the vector

components except that i0 ° x i0 ° blocks within T50 o latitude

22
are selected with an equatorial number of 15 per i0 ° x i0 °

block, while outside of _50 ° latitude an equatorial number of

90 per i0 ° x i0 ° block is used.

These data were written onto cartridge SU5012 from tape KJEII.

2. The Basic FIT Data Sets.

A new procedure for selecting data was next implemented resulting in a

completely new data set for main field modeling. The Magsat data were

initially screened on the three hourly Kp index by choosing only data for

KP < i- and for which the previous three hourly Kp index was less than or

equal to 2 ° . Component data at latitudes poleward of 50 ° geomagnetic

latitude were excluded to minimize the effects of field aligned and

ionospheric currents in the auroral regions, while scalar data (either from

the scalar instrument or from vector measurements) were retained. After

the initial screening, the data were sorted into separate subsets for dawn

and dusk by Dst value into 5 nT intervals from -22.5 to +22.5 nT and

visually scanned both for quality and to assure minimization of the effects

of short wavelength external fields. These data were kept on tapes and

files as follows:

Dst, nT (T2.5) TAPE FILE

-20 TD5349 12

-15 TD6458 i0

-i0 TD6576 i0

-5 TD5349 13

0 TD6458 Ii

5 TD6576 ii

i0 TD5349 14

15 TD6458 12

20 TD6576 12

At present only tape TD6576 can be located, so this data set is essentially

lost.

Separate models were derived from data at dawn and dusk (see Langel and

Estes, 1985). The difference between these models was significant, and it

appeared to have the characteristics which would be expected if a

significant effect were present in the dusk data due to the equatorial

electrojet, the Sq current system, and the effects of meridional currents.

These effects were particularly evident in the latitude ranges:

X data for Igeomagnetic latitudel < 20 °

Y data for Igeomagnetic latitudel < 15 _

Z data for Igeomagnetic latitudel < 50 °

B data for Igeomagnetic latitudel < 20 °

Accordingly a "corrected" data set was derived. The correction left the

dawn data unchanged but affected the dusk data within the latitude limits

specified above, i.e. a correction was applied to the dusk data within

23
these latitude limits. The correction was based on the spherical harmonic

models derived from the DUSKand DAWNdata sets separately. The correction

added to the dusk data is

= BDAWNModel - BDUSKModel

The corrected data sets, still sorted by Dst, are located on on files 1-9

on cartridge SU5006and tape DT0245tape, as follows:

UNCORRECTED CORRECTED

Dst, nT (@2.5) TAPE FILE CARTRIDGEFILE

-20 TD5349 12 SU5006 i

-15 TD6458 i0 2

-i0 TD6576 I0 3

-5 TD5349 13 4

0 TD6458 ii 5

5 TD6576 ii 6

i0 TD5349 14 7

15 TD6458 12 8

20 TD6576 12 9

Files i0 of SU5006and DT0245 contain all of the data.

To establish Magsat data sets for spherical modeling of the main field, an

algorithm was then applied to the above described data sets for dawn and

dusk selecting data from all Dst levels. The data selection algorithm was

applied separately for the time intervals (i) November December, 1979;

(2) January - February, 1980; and, (3) March April, 1980, in an attempt

to obtain a uniform data distribution in both time and space. For each

period, and for dawnand dusk separately, vector data in the range _50°

geomagnetic latitude and magnitude data poleward of @50 ° latitude were

collected into 5 ° x 5 ° equiangular bins over the globe. In regions where

vector data were sparse within T50 °, available scalar data were retained.

Within each bin the data were sorted by time and a mean and standard

deviation calculated. All data with residual (relative to the GSFC(9/80)

model) greater than 150 nT, and/or greater than 2_ from the mean, were

rejected.

The desired number of points in each bin was selected so as to obtain

roughly the same number of points for equal area at all latitudes. This

was accomplished by specifying a maximum of nine values for each vector

component in an equatorial 5 ° x 5 ° bin, and scaling the number of points in

=ach bin at other latitudes by the cosine of the latitude. An equatorial

bin value of 27 was used for scalar data retained p,'[,,_ard of 550 °, while 6

was used for scalar data retained within T5O ° Ea,;l, ,_i tile nine Dst

intervals was assigned an algorithm weighting factor [in nT) as follows:

Dst -20 -15 -I0 -5 0 5 I0 15 20

Weight 8 8 8 8 8 i0 12 14 16

24
If a bin has more data than is desired after applying the above criteria,

data are rejected first by an interval skipping algorithm (to maintain good

temporal distribution) and then by eliminating data with higher algorithm

weight factors. The mean and _ of the residuals for each data type within

each bin for the resulting global distribution were computed.

This "full" Magsat data set was written on MG0015.This tape has definitely

been written over and its contents destroyed, so the data set is lost. The

tape was in "Gridded" Format with the following files:

FILE

13

14

15

16

17

18

DESCRIPTION

November- December, Dusk data.

January February, Dusk data.

March - April, Dusk data.

November December, Dawndata.

January - February, Dawndata.

March - April, Dawndata.

To obtain managable data sets for least squares modeling while retaining

good temporal and geographic coverage, the above global data sets were

reduced to approximately one third size. Within each 5° x 5° bin, and for

each data type, an interval skipping algorithm was used (with data sorted

by time) to take every third point. Any further reduction required was

accomplished by eliminating data with the largest absolute deviation from

the mean.

To these November- December, January - February, and March - April reduced

Dawnand Dusk data sets were added passes in sparse areas for purposes of

improving the geographic coverage. These passes were of greater

disturbance levels than the previously selected data and were assigned

higher data noise sigmas in the data set. These sigmas were determined

during special pre-processing and were stored in gridded format (see

section XI). Typical sigmas for DAWNand DUSKdata in sparse regions ranged

from 40 to I00. These values of _ were taken into account when deriving the

DAWN(6/83)and DUSK(6/83) models. The resulting data sets are referred to

as the DAWNand DUSKdata sets.

To obtain a combined Magsat data set with good spatial _overage, the DAWN

and DUSKdata were merged, with stronger emphasis given to the dawn data.

This was accomplished by assigning a commonalgorithm weighting factor to

all dawn data (exclusive of the special passes in sparse regions). The

samealgorithm weighting factor was assigned to dusk data (exclusive of the

special passes in sparse regions) in the following regions which seemto be

least affected by Sq and the equatorial ionospheric currents:

X data for Igeomagnetic latitudel > 20°

25
Y data for Igeomagnetic latitudel > 15 °

Z data for Jgeomagnetic latitudel > 50 °

B data for Igeomagnetic latitudel > 20 °

The special sparse region passes (about i00 points for both dawn and dusk)

were correspondingly given a higher algorithm weighting factor during preprocessing. This resulted in higher sigmas for these sparse points with

typical values ranging from 40 to 200. The specific algorithm weight

factors used in this and the following cases can be determined from the

final "Gridded" format data sets (see section XI).

The dusk data inside the above indicated geomagnetic latitude limits, i.e.

equatorward of 20 ° for X and B, equatorward of 50 ° for Z, and equatorward

of 15 ° for Y, were given an intermediate algorithm weighting factor during

pre-processing.

Two separate combined data sets were derived based on the treatment of the

dusk data within these latitude limits. A data set denoted the COMBINED

DATA SET used the dusk data within these limits directly (with the

intermediate weighting factor), while a set denoted COMBINED DATA

(CORRECTED) applied the previously described correction to the dusk data

within the appropriate latitude limits.

Pre-processing the merged dawn and dusk data sets involved sorting the data

within each 5° x 5° bin by weighting factor. The data with the lowest

algorithm weighting factors were used to determine the sigmas for each bin.

This procedure effectively selects dawn and dusk data equally outside of

the specified geomagnetic latitude limits, while within these limits dawn

data are preferentially taken with dusk data used only to fill in 5° x 5°

bins sparse in dawn data.

The sigmas for the final data sets were determined using subroutine SVDATA

(from the old 'FIT' program; reading gridded format). Scalar and vector

data were intially assigned a sigma of 8, while dusk vector sigmas were 16.

If the absolute value of the dipole latitude exceeded 50 °, the scalar

sigmas were assigned a value of 12 (only scalar data were used at these

latitudes). If the sigmas from the 5° x 5° binning pre-processing exceeded

the initial dawn and dusk sigmas, the later sigmas were used in the

weighting. If data were in sparse regions, the special sparse data sigmas

were assigned for the vector and scalar data.

The basic uncorrected data sets are containeU o_l ,_ar_J.d_e SU5006 files ii32 and on files (1-22) on tape MG0017, in "Gridde,J" f_,:mat in the following

files:

FILE DESCRIPTION

ii (i) November - December, Dawn data, after selection of every third

point

12 (2) January - February, Dawn data, after selection of every third

26
13

14

15

16-20

21

(3)

(4)

(5)

6-10)

(ii)

22 (12)

point

March - April, Dawn data, after selection of every third point

November December, Dawn data, data added in sparse areas.

March - April, Dawn data, data added in sparse areas.

Same as 11-15, except for Dusk data.

November December, Dusk data, Special selected vector data

at polar latitudes.

March - April, Dusk data, Special selected vector data at

polar latitudes.

23-24 13-14) Same as 21 - 22, except Dawn data.

25-29 15-19) Copy of Files 11-15

Note: Files 16-20 were used in the DUSK(6/83) Model

Files 25-29 were used in the DAWN(6/83) Model.

30 (20) Jan - Feb DAWN special data set, vector at all latitudes, for

Jr computation.

31 (21) Jan Feb DUSK special data set, vector at all latitudes, for

Jr computation.

The "corrected" data sets and the combined data sets are contained on

cartridge SU5006 files 33-44 and on tape 0F0933 files (i-12), in "Gridded"

Format, as follows:

FILE DESCRIPTION

33-35 (1-3) Erroneous data sets, ignore

36 (4)

37 5)

38 (6)

Jan - Feb, Dawn A data set (Data-DAWN Model) for special Jr

computation (vector at all latitudes).

Jan - Feb, Dusk A data set (Data-DAWN Model) for special Jr

computation (vector at all latitudes).

Dusk data (files 16-22 of SU5006) corrected by _ DAWN - DUSK

models.

39 7) COMBINED DAWN AND DUSK (CORRECTED) Nov - Dec.

40 8) COMBINED DAWN AND DUSK (CORRECTED) Jan - Feb.

41 9) COMBINED DAWN AND DUSK (CORRECTED) March - April.

42 (i0) COMBINED DAWN AND DUSK, (UNCORRRECTED) Nov. - Dec.

27
43 (ii) COMBINEDAWNANDDUSK, (UNCORRECTED) Jan - Feb.

44 (12) COMBINEDDAWNANDDUSK,(UNCORRECTED) March - April.

Copies of 0F0933 are contained on DT0005, DT0028, and DT0029.

The final MAGSATdata in the newfit format are on XRIRB.MAGSAT.GI2#89and on

cartridge SU5500file i. These data (in COMBINEDand CORRECTEDform) are

composedof files 39, 40, and 41 from SU5006. They were processed through

XRTJS.LIB.CNTL(MAGSAT) where the data was reformated, and weights were

assigned to the data based on location and magnetic activity as in SVDATA.

3. Small Subsets Selected for Equal Area Distribution.

Whenworking with Loren Shure on Harmonic Spline Models (e.g. Shure, Parker

and Langel, JGR, 90, 11505-11512, 1985), sets of decimated data were

extracted from the basic data set. The original Harmonic Spline models

required inversion of a data by data matrix so a relatively small data set

was desirable. Later models were freed of this restriction. The data sets

so selected acquired the name "LOREN"data sets.

These data sets are located in the PDSFS#GM.LOREN.DATA(...)

Member Number Description

Name of Pts.

L05DHLAT 391

LO5DLLAT 1263

L5DNHLAT 392

L5DNLLAT 1262

L5DKHLAT 398

LSDKLLAT 1256

LO6DHLAT 267

L06DLLAT 881

5° Equal Area Binned

5 ° Equal Area Binned

5 ° Equal Area Binned

5 ° Equal Area Binned

5 ° Equal Area Binned

5 ° Equal Area Binned

6 ° Equal Area Binned

6 ° Equal Area Binned

Combined Dusk and Dawn, High Lat.

Combined Dusk and Dawn, Low Lat.

Dawn only, High latitude.

Dawn only, Low latitude.

Dusk only, High latitude.

Dusk only, Low latitude.

Combined Dusk and Dawn, High Lat.

Combined Dusk and Dawn, Low Lat.

LO7DHLAT 201

LO7DLLAT 643

L7DNHLAT 203

L7DNLLAT 641

L7DKHLAT 203

L7DKLLAT 641

7 ° Equal Area Binned

7 ° Equal Area Binned

7 ° Equal Area Binned

7 ° Equal Area Binned

7 ° Equal Area Binned

7 ° Equal Area Binned

Combined Dusk and Dawn, High Lat.

Combined Dusk and Dawn, Low Lat.

Dawn only, High latitude.

Dawn only, Low latitude.

Dusk only, High latitude.

Dusk only, Low latitude.

L5DNI313

L92DHLAT 22

L92DLLAT 70

Field Model

Z data only. 22 points. Aft. = 500km. High latitude

XYZB data, Alt. = 500 km.. [_w latitude.

[All high latitude data are Z component only.]

These data sets are stored on cartridge SU5008.

G. DE-2

28
DE-2 Satellite Data. (For a more detailed discussion of this data,

see Ridgway (1988), Langel et al. (1988).

i. Original Data

The original data set is stored on cartridge SU5010file 1 and on tape

DT0034. There are approximately 19600 3-component magnetic field readings

from 9/30/81 through 1/6/83. The data are heavily concentrated at the poles

and near January, 1982 (See section XI for formats).

The processed data as described by Ridgway (1988) are stored on cartridge

SU5010files 2-4 with each file containing roughly 10,577 data points.

2. Processing Procedure

The data were first sorted into 3 time zones. Time zone #I spanned 9/30/81 -

3/7/82, time zone #2 spanned 5/23/82 - 8/15/82, and time zone #3 spanned

12/1/82 - 1/6/83. Within each zone, data were geographically sorted into

equal-area bins of size i0 degrees square at the equator. Data were

decimated in each bin utilizing various quality criteria until i0 vector

points were obtained (below 30 degrees dip-latitude) or 30 scalar points

were obtained (above 30 degrees). The DST index was appended to each data

point. A further data set was created by calibrating the vector magnetic

values with land observatories.

Data processing programs (all under XRJRR.DE2.PROGRAMS and stored on SU9500)

are su_na_ized in the satellite data notebook and in section XII.

The processed data are stored on disk and on files 2-4 on cartridge SU5010.

i) File#2 or disk file XRJRR.DE2.FITPRP2A is binned data in spacecraft

coordinates. Format identical to original format except that there are i00

points per logical record instead of I, with each point containing 22 real

words instead of 21. Word #22 equals the DST index.

ii) File#3 or disk file XRJRR.DE2.FITPRP.XYZOLD is binned data in

topocentric (XYZ) coordinates. The data are non-calibrated and have the same

format as file#2 except that word #3 contains X(north) magnetic component,

#4 contains Y(east) component, #5 contains Z. Position of satellite still

in GCI coordinates.

iii) File#4 or disk file XRJRR.DE2.FITPRP.XYZCAL is binned data in

topocentric coordinates, and the data have been calibrated with ground

observatories and have the same format as file #3

Data from XRJRR.DE2.FITPRP.XYZCAL were decimated aL,_ve +-50 o geomagnetic

latitude where every third point was choosen. They were then converted to

the new FIT format using program XRTJS.LIB.CNTL(DE2) and weights added. A

non-weighted data set is stored on file 2 of SU5500 (XRIRB.DE2.GI2#89), and

the weighted data set is stored on file 3 of SU5500 (XRIRB.DE2.BWT.GI2#89).

This data set was used in the analysis by Langel et al. 1988 and contains

5100 points.

29
File XRIRB.DE2.GI2#89was copied on to a 3.5 inch diskette by J.R. Ridgway

for general distribution. The fomat of the diskette file is not in newfit

format (see section XII.).

H. DMSPF-7

i. Background

The DMSPF7 spacecraft was launched on 18 Nov, 1983 into a 98.74 degree

inclination orbit, with apogee 844 km altitude and perigee 822 km. (Rich,

1984). The primary purpose of the spacecraft was to obtain tropospheric

meteorological data. However, a triaxial fluxgate magnetometer was included

on the spacecraft in order to monitor the geophysical environment. Analysis

of the DMSPdata revealed that the magnetometer data were too severely

contaminated by onboard noise to be of use for main field modeling. The DMSP

data are reported in detail in (Langel et.al, 1990) and (Ridgway et. al,

1989).

30
VIII. REPEAT STATION DATA.

Repeat stations are locations at which "permanent" markers are located so

that measurements can be taken at widely separated times at the same

location. Such stations are ideally occupied, i.e. measurements taken, at

three to six year intervals. In many cases only one or two occupations have

occurred. In some cases different names have been used at different

occupation times. In this and in other cases, we cannot actually be sure

that exactly the same location was occupied.

i. The NOAA World-wide repeat data on reel DT0049 and on file i of cartridge

SU4000 span the time period 1900 to 1985 and contain approximately 13,000

data points with numerous observations having sign errors or duplicate

records. These data also contained various source numbers which were not

recorded in the Survey Catalog (see section X.).

2. A second file of repeat data was assembled as noted in Figure 3. by

merging all of the NEW.SDATXX.DATA files with data types equal to 9 (ie.

repeat data). This file contains all of the repeat data posessed by BGS and

is stored on disk XRIRB.REPEAT.DATA and on file 2 of SU4000.

These two data sets were merged and duplicate records and duplicate records

in time and location were removed using program XRIRB.SURVEY.PROGRAMS

(DUPLIC). The cleaned-up and questionable files are stored on disk

XRIRB.CL9.REPEAT and XRIRB.CL9Q.REPEAT (Figure 4). Further processing of

these data are anticipated in the future.

NOAA + BGS

Repeat Data

-_(DUPLIC)_

CL9.REPEAT I

CLgQ.REPEAT I

Figure 4.

31
IX. ANCILLARY DATA

This catagory of data includes secular variation model data and Kp and Dst

data sets.

Secular variation data from 1975-1985 (centered at 1980.0) produced by

Johnston (1985) in California are stored on disk data set XRIRB.CALSV.G02#90

and on cartridge SU6500

Kp data from January I, 1932 through June 30, 1988 are stored on reel tape

802991 and cartridge SU7000. Also on SU7000 and tape TD5696 are Dst data

from January i, 1957 through December 31, 1985.

X. NGDC SURVEY CATALOG

A. The Catalog Format

The following is a catalog of surface surveys residing on the NGDC data set.

The catalog format is relatively self explanitory except for a few items.

The first number consists of the survey source code followed by a page

number, e.g. 41 = source code 4, page i; 42 = source code 4, page 2. This is

_ollowed by the year and country of publication. Still on the first line

are the start and stop year of the survey and the elements measured.

The full format is as follows:

Card i

C o iumn s

1-4

5

6

7-10

11-13

14

15-34

35-36

37

38-39

40

41-43

44

45-47

48

49-56

57-63

64-66

67-73

74-80

Contents

Source Number - as filed at WDC-A

Card Number (i for first card, 2 for second...)

Volume Number CA-Z)

Year of publication (or of receipt of document)

Country publishing (coded, left justified, FIPS)

Code for countries covered (C) or area description (D)

Country codes or area description

High latitude (deg.)

North/South designator iN or S)

Low latitude (deg.)

Hemisphere designator (N or S)

High longitude (deg.)

Hemisphere designator (E or W)

Low longitude (deg.)

Hemisphere designator (E or W)

Beginning year and end year of observations (i.e. 19481952)

Elements (observed, or calculated) D,I,H,X,Y,Z,F

Type(s) of observations (coded and left justified)

l=land survey,2=aeromagnetic,4=3-component marine,5=satellite

6=scalar marine.9=repeat,0=observatory

Beginning serial number

End Serial number

32
Cards 2-9

Columns

i-4

5

6

7-80

Contents

Source Number (as above)

Card Number (as above)

Volume Number (as above)

Title, author, agency bibliographical information separated

B. Data Given a Source Code but not Entered in Catalog.

Source Code Data Description

720

755

756

757

758

761

762

764

765

768

769

770

771

772

776

777

778

780

888

900

Japanese repeat data, i observation.

Pacific Ocean repeat data, 161 observations

West African repeat data, 108 observations

Mexico, South or Central America, 303 repeat obsevations

Spanish repeat data, 345 observations

Italian repeat data, 112 observations

Japanese repeat data, 437 observations

Thialand, repeat data, 193 observations

Guatamala, repeat data, 286 observations

Peru, repeat data, i0 observations

Japanese repeat data, 24 observations

Eastern Africa, repeat data, i observation

Mexico, South or Central America, 519 repeat observations

South Africa, 12 repeat observations

New Zealand, 9 repeat observations

Canada, 1517 repeat observations

Canada, 2 repeat observations

Western Africa, 32 repeat observations

Kosmos-49 Data, As Described in Section VII.

Soviet Survey Data furnished by Golovkov of IZMIRAN.

C. Survey Catalog

33
40*

41 1946GE Latvia 19391943DIH 9 339 68

42 Magnetic survey of Latvia, 1937-1943-Dr. L. Slaucitajs/

50*

51 1933PL Poland 19101930DIH 1 690 225

52 Leve magnetique de la Pologne*Stanislaw Kalinowski/

60*

61 1920SW Sweden 1919 1 2257 228

62 Magnetiska deklinationsbestamningar ar 1919 i Stockholms Norra Skargard.

63 G.S. Ljungd_hl/

70*

71 19228W Sweden 1919D 1 2287 234

72 Magnetiska deklinationsbestamningar ar 1919 pa Gottland*G.S. Ljungdahl/

80*

81 19348W Sweden 19281930DIH 1 2348 260

82 Magnetic survey of Sweden* G.S. Ljungda/11*Hydrographic Service/

90*

91 19398W Sweden 1937DIH 9 2605 27C

92 The re-survey of the magnetic main repeat-stations in Sweden for the epoc

93 July 1, 1936*Gustaf S. Ljungdahl/

I00-

101 19278W Sweden, Finland 1925D H Z 14 2729 295

102 Magnetic measurements in the Baltic Sea, South Quarken and northern coast

103 of the Baltic Sea*J. Keranen & H. 0delsio/

II0-

IIi 19368W Sweden 19281934D 1 2959 499

112 General Earth magnetic investigation of Sweden carried out during the

113 period 1928-1934*Kurt Molin*Geological Survey of Sweden/

120-

121 19408W Sweden 1938D H Z 1 5010 515

122 Magnetic measurements on the "Kompass" in the Baltic Sea 1938-

123 G.S. Ljungdahl/

130-

131 1912US Worldwide 19051910DIH I 5159 742

132 Land magnetic observations 1905-1910*L.A. Bauer* Dept. of Terrestrial

133 Magnetism/

140-

141 1915US Worldwide 19111913DIH 1 7430 956

142 Land magnetic observations 1911-1913 and reports on special researches.

143 L.A. Bauer & J.A. Fleming/

150-

151 1917US Worldwide 19051916DIH 4 9571 1264

152 Ocean magnetic observations 1905-1916 and reports on special researches.

153 L.A. Bauer*Dept. of Terrestrial Magnetism/

160.

161 1921US Worldwide 19141920DIH 1 12692 1613

162 Land magnetiy observations 1914-1920-Researches of the Dept. of Terr. Mag

170-

171 1926US Worldwide 19151921DIH 4 16139 1972

172 Ocean magnetic and electric observations 1915-1921*Dept. of Terr. Mag./

180.

181 1927US Worldwide 19181926DIH 1 28070 3311

182 Land magnetic and electric observations 1918-1926*Dept. of Terr. Mag./

190-

191 1933URUSSR & vicinity 190OI930DIH 1 19742 2806

192 Catalogue of magnetic determinations in USSR and adjacent countries*

193 Weinberg/

200*

201 1947US Worldwide 19271944DIH 14 33791 3462

202 Land and ocean magnetic observations 1927-1944*Dept. of Terr. Mag.*Also

34
203 numbers 32024-33578 (incomplete)/

210-

211 1949CA Canada, north of 60 N. 19381947D 1 34630 349_

212 Declination results at Canadian stations north of latitude 60 degrees N*

213 R.G. Madill/

220*

2211918JA Japan I913DIH 1 34993 3532

222 A magnetic survey of Japan for the epoch 1913.0*The Bulletin of the

223 Hydrographic Office, Imperial Japanese Navy, Vol. II/

230*

231 1926JA Japan 1923DIH 1 35323 3553

232 A magnetic survey of Japan for the epoch 1923.0*The Bulletin of the

233 Hydrographic Dept., Imperial Japanese Navy, Vol. V/

240*

241 1936JA Japan 19321933DIH 1 36144 363@

242 Magnetic survey of Japan 1932-1933*The Bulletin of the Hydrographic Dept.

243 Imperial Japanese Navy Vol. VIII/

250*

251 JA Japan 19421944DIH 1 35532 356C

252 Preliminary values of magnetic elements from surveys made in 1942-1944 at

253 Japanese secular variation stations*Mr. Samo*Hydrographic Dept./

260*

261 1944NZ New Zealand 19411943DIH 1 35602 3614

262 Tabulation of observations of 1941,42,43*Director of Observatory/

270

271 NZ New Zealand 19441947DIli 1 36748 3700

272 Tabulation of magnetic survey of New Zealand 1944-1947/

28O

281 NZ New Zealand 1948DIH 1 37003 3710

282 Tabulation of magnetic observations at field stations in NZ Jan to May 4@

29O

291 IN India 19011920DIH 1 40745 4786

292 The magnetic survey of India 1901-1920*Records Surv. India, Vol. XIX/

3OO

301 IN India 19301931DIH 1 37103 3721

302 Survey of India, Geodetic Report Vol. VII for 1st Oct to 30th Sept 1931/

310-

311 1947US Tibet 1947 1 37214 3726

312 Preliminary report on the magnetic results of a journey to Sikkim and

313 southern Tibet*Terr. Mag., Vol. 52, pp. 505-521/

320

321 1931CH China, Tibet 19261928 1 37269 3741

322 Die erdmagnetischen Beobachtungen yon Dr. Filchner auf seiner Reise in

323 China und Tibet in den Jahren 1926-1928-0. Venske*Veroff. Preuss. Met.

324 Inst., Abhand. Bd. IX, Nr. 7/

330

331 CH China 19361947DIH 1 37419 3778

332 Results of m_gnetic observations in China by Natl Geological Survey of

333 China: SW China 1940-43. Academia Sinica: SE coast 1936; Kwangsi Prov

334 1939; Fukien Prov 1942-2; Pehpei 1945-6; observations in 1946-7/

340*

341 CH Tibet 19351937DIH 37852 3813

342 Geophysikalisches Institut Potsdam Abhandlungen 7 Ergebnisse der erd343 magnetischen Beobachtungen Prof. Filchners auf seiner zweiten Tibetreise

344 1935-1937/

350-

351 1937CH China D 1 38135 3849

352 Observatoire de Zikawei, Etudes sur le magnetisme terrestre, Etude 40,

353 Carte magnetique de Chine, Fasc X Tabulation/

360"

35
361 1907ID Bast Indies (Indonesia) 19031907DIH 1 38503 386_

362 Magnetic survey of Dutch East Indies 1903-07-Dr. W. van Bemmelen*Obsns.

363 Roy. Magn. Met. Obs., Batavia, Vol. XXX, App. I/

370*

371 1916NZ New Zealand 1903DIH 1 38661 3891

372 A magnetic survey of the Dominion of New Zealand-Lands and Survey Dept./

380*

381 1925]]) Netherlands East Indies (Indonesia) 1925DIH I 38936 3909

382 Isomagnetics for the Netherlands East Indian Archipelago epoch 1925*

383 Visser*Kon. Magn. Met. Obs., Batavia, Verhand. No. 13/

390*

391 1938CH China 19081937 10 39103 3917

392 Observatoire de Zi-ka-wei Observations magnetiques Tome XXIIAnnee 1937/

400*

401 1916AS Australia 1914DIH 1 39174 3921

402 Results of magnetic and astronomical observations between Oodnadatta,

403 Warrina and Musgrave Ranges Sept to Nov 1914*Adelaide Observatory/

410

411 CA Canada 19071920DIH 1 40121 4012

412 Publications of the Dominion Observatory Ottawa Vol. V No. 5/

420

421 CA Canada 19211923DIH 40123 4030

422 Publications of the Dominion Observatory Ottawa Vol. VIII No. 8/

430

431 CA Canada 19241926DIH 1 40121 404C

432 Publications of the Dominion Observatory Ottawa Vol. VIII No. 10/

440-

441 1940CA Canada 19271937DIH 1 40405 4074

442 Publications of the Dominion Observatory Ottawa Vol. XI No. 7/

450-

451 1924CA Canada DIH I 47868 6416

452 Magnetic results in Western Canada*Topographical Survey of Canada*Dept.

453 of the Interior, Canada/

460*

461 19093F South Africa I8981906DIH I 64184 6785

462 Report of a magnetic survey of South Africa*J.C. Beattie/

470*

471 1930FR Angola, Rhodesia (Zimbabwe) 19121914DIH 1 67854 679C

472 Mission Rohan-Chabot, Tome II 1912-1914/

480*

481 1915EG Egypt, Sudan 1910DIH 1 67903 6801

482 Magnetic survey of Egypt and the Sudan*H.E. Hurst*Ministry of Finance/

490*

491 GE Antarctica 19011903D 1 68019 6825

492 German South Polar Expedition*Deutsche Sudpolar Expedition V,

493 Erdmagnetismus i, Erdmagnetische See Beobachtungen by F. Bidlingmaier

494 II Tell, Deklination, pp. 327-329, 332-334/

500*

501 1948US Worldwide 0

502 List of geomagnetic observatories and thesaurus of values - VIII*Fleming

503 & Scott*Terr. Magn., Vol. 53, No. 3, pp. 200-234/

510-

511 1944US Worldwide 0

512 List of geomagnetic observatories and thesaurus of values - VI _ VII*

513 Fleming _ Scott*Terr. Magn., Vol. 49, Nos. 3 _ 4 pp. 199-200, 267-269/

520*

521 1944US Worldwide 0

522 List of geomagnetic observatories and thesaurus of values - I to V*

523 Fleming & Scott*Terr. Magn., Vols. 48 (1943) & 49 (1944)/

540*

36
541 1909UK Antarctica IgoII904DIH 1 72515 7296

542 National Antarctic Expedition 1901-04 Physical Observations*Royal Society

543 London/

55O

551 IN India 19441947DIH 1 72969 7321

552 Survey of India Technical Report 1947, Part III-Geodetic Work/

560*

561 19425F South Africa 19381940D H Z 1 73218 7329

562 Transactions of the Royal Society of South Africa Vol XXIX Part IV/

57O

571 SF Rhodesia 19051916DIH 1 73294 7337

572 Transactions of the Royal Society of South Africa Vol VIII Part IV/

580*

5811921UKAntarctica 19101913DI 4 73372 7378

582 British Antarctic Expedition 1910-13 in ship "Terra Nova"/

590*

5911g37SF South Africa 1936D 1 73788 7398

592 Magnetic declination in South Africa*Dept of Irrigation/

6O0

601 1929TH Siam (Thailand) I9261929DIH 1 74038 7417

602 Report on the operations of the Royal Survey Dept*Ministry of War 1926-27

603 1928-29 /

610

611 TH Siam (Thailand) Ig371938DIH 1 74177 7422

612 Report on the operations of the Royal Survey Dept*Ministry of Def 1937-38

620*

621 1923UKArctic 1923D 1 74229 7425

622 The Geographical Journal Vol LXII, July to Dec. I923*Royal Geographical

623 Society London/

640

641 AS Australia 19461948DIH 1 74317 7437

642 Results of field observations of terrestrial magnetism*Bureau of Mineral

643 Resources/

660*

661 1924FR French Africa I924DIH I 74420 7481

662 Annales de l'Institut de Physique du Globe 1924 Vol 2/

670*

671 19271JK Channel Islands, S England I9251926DIH I 74824 7486

672 Magnetic survey of Channel Islands in 1925 and Southern England in 1926-

673 Ordnance Survey/

680*

681 1929UK Englamd, Wales I9271928DIH I 74863 7489

682 Magnetic survey of England and Wales*0rdnance Survey/

690*

691 193OUK Englamd, Wales, Scotland 19281929DIH 1 74899 7494

692 Results of the magnetic observations made by the Ordnance Survey in

693 England and Wales in 1928 and preliminary results (declination only)

694 of those made in Scotland in 1929/

7OO

701 GE Arctic 1931D H 2 74948 7502

702 Die Arktisf_hrt des Luftschiffes "Graf Zeppelin"*Petermanns Mitteilungen/

710

711 UK East Africa 19391942 1 75030 7519

712 Magnetic observations made in British East Africa 1939-1942

72O

721 EG Egypt 19361939D I 75355 7537

722 Report on terrestrial magnetism at Helwan Observatory/

730*

731 1925FR French Africa DIH 1 75372 7552

732 Annales de l'Institut de Physique du Globe Vol 3/

37
740=

741 1926FR French West Africa, Syria 1926DIH 1 75524 7567

742 Annales de l'Institut de-Physique du Globe Vol IV/

750*

751 1916BR Brazil 19131915DIH 1 75674 7573

752 Terr. Magn. Arm. Electr., Vol 21, No S, 1916/

760*

761 1912BR Brazil 19101911DIH 1 75734 7578

762 Terr. Magn. Arm. Electr., Vol 17, No S, 1912/

770*

771 1928Y0 Yugoslavia DIH 1 75783 7602

772 Razdioba Glavnih Elemenata Zemaljskoga Magnetizma*Travaux de l'Institut

773 de Physique du Globe de Zagreb/

78O

781 BR Brazil 19381942 1 76029 7607

782 Anais Hidrograficos, Vols VI-_IX (Vol VI for 1938 and previous

783 observations, Vol VII for 1939, Vol VIII for 1940, Vol IX for 1941-42) /

SO0

801 1940FR French West Africa 1940DIH I 76088 7614

802 Comptes Rendus des Seances de l'Academie des Sciences Tome 210 No 6/

810

811 AG North Africa 19431945DIH 1 76149 7646

812 Resultats de mesures magnetiques faites au Sahara Algerien et en

813 Tripolitaine de Dec 1943 a Juin 1945-J. Dubief/

820

821 1948FR French Africa I9461947DIH 1 76468 7693

822 Resultats de mesures magnetiques enAfrique Francaise*J. Dubief*Travaux

823 Inst. Met. Phys. Globe de l'Algerie, Fasc. 8/

83O

831 1905BF Bahama Islamds DI F1 76932 7693

832 Magnetic observations in the Bahama Islands*Oliver L. Fassig, Ph.D./

84O

841 1944FR Algeria, Tripolitania 1943DIH 1 76941 770C

842 Resultats de mesures magnetiques au Sahara (Algerie et Tripolitaine)

843 en 1943-J. Dubief*Travaux Inst. Met. Phys. Globe d'Algerie, Fasc. 6/

850*

851 1937FR French North Africa, Morocco, Syria 1937DIH 1 77005 7731

852 Annales de l'Institut de Physique du Globe Vol XV (Morocco, Syria, French

853 North Africa) /

860

861 AR Argentina 1948DIH 1 77313 7735

862 Relevamiento Geomagnetico de la Republica Argentina/

87O

871 1934FR French Equatorial Africa 1934D 1 77358 7737

872 Memoires de l'Academie des Sciences de l'Institut de France/

88O

881 1944IT Albania, Ethiopia 19391942DIH 1 77376 7748

882 Geofisica Pura e Applicata Vol VI Fasc 1-2/

89O

891 1943FR North Africa DIH 1 77468 7758

892 Travaux de l'Institut de Meteorologie et de Physique du Globe de

893 l'Algerie, Fasc 1 /

9OO

901 1948UYUruguay 19401943D 1 77584 7767

902 Relacion de las estaciones de magnetismo hechas hasta la fecha espresandc

903 las coordenadas geograficas, fechas de observacion y valores obtenidos*

904 Ejercito Nacional, Instituto Geografico Militar/

910

911 1940R0 Romania I940DIH 1 77681 7776

912 Mesures magnetiques en Roumanie de 1931 a 1940 et cartes magnetiques de

38
913 la Roumanie dressees pour le ler Juillet 1940/

920

921 194720 Romania Ig311947DIH I

922 Valeurs des elements magnetiques et des variations seculaires a Sassy,

923 pendant 16 ans, de 1931 a 1947*Stefam Procopiu

930*

931 1935RD Romania 1934 1 77807 7789

932 Determination des elements magnetiques en Roumanie et cartes magnetiques

933 de la Roumanie dressees pour le ler Juillet 1934=Includes Source 92/

95O

951 19339E Balkans 1933DIH 1 77912 781C

952 Beitrage zur Geophysik Band XXXlX/

960

961 CO Colombia 19201948D 1 78106 7819

962 Estaciones magneticas en Colombia/

970*

971 1907EG North Africa 18951905DI 1 78242 7827

972 Magnetic observations in Egypt 1895-1905*B.F. Keeling/

99O

9911911BE Arctic 1907DIH Z 1 78367 7837

992 Campagne Arctique de 1907/

1000-

i001 1928FR Upper Volta, Ivory Coast 1926DIH I 78373 7845

1002 Annales de l'Institut de Physique du Globe de l'Universite de Paris et du

1003 Bureau Central de Magnetisms Terrestre Tome VI/

I010*

I011 1931FR Syria 19251930DIH 1 78458 7849

1012 Annales de L'Institut de Physique du Globe de l'Universite de Paris et du

1013 Bureau Central de Magnetisme Terrestre Tome IX/

1030-

1031 1935FR Morocco, Madagascar, Greenland I9321933DIH 1 78526 7860

1032 Annales de l'Institut de Physique du Globe de l'Universite de Paris XIII/

1040-

1041 1939FR Algeria 1938DIH 1 78606 7893

1042 Annales de l'Institut d_ Physique du Globe de l'Universite de Paris XVII/

1050-

1051 1943FR Algeria, Morocco, Syria 19381941DIH I 78940 7922

1052 Annales de l'Institut de Physique du Globe de l'Universite de Paris XXI/

I060

1061 Brazil, Bolivia 19381939 1 79226 7924

1062 Manuscript: Results of magnetic observations between Corumba, Brazil &

1063 Santa Cruz, Bolivia during Oct 1938 to March 1939/

1080-

1081 1933FR Syria, Indochina, Siam (Thailand) 1932DIH I 79252 7931

I082 Annales de l'Institut de Physique du Globe de l'Universite de Paris XI/

II00

II01 1948 Arctic, Ceylon, Greenland 19411948D 1 79344 7934

1102 Letter from Surveyor General, Ceylon to CIW, Feb 1948*Four values of D at

1103 Colombo Observatory, 1941, 1943, 1945, 1948*Includes Sources 107,109,118/

III0

IIII NZ New Zealand 19481949DIH 1 79350 7942

1112 Manuscript: Tables detached from letters from Baird, Christchurch NZ/

1120

1121 US Greenland & vicinity 1938D I 79425 7943

1122 Photostat: The northeast coast of Greenland, Hydrographic surveys in the

1123 Greenland Sea=Louise A. Boyd/

1150

1151 1937MA Madagascar 19271936D H I 79472 7966

1152 Annales Geologiques du Service des Mines Fasc VII/

1160

39
1181 1939FR French Somaliland (Somalia) 1939D H 1 79666 7968

1182 Magnetic observations in 1939 on the coast of French Somaliland.Comptes

1183 Rendus, Academy of Science, France. May 8, 1939/

1170-

: 1171 1904US Arctic 19001902D 1 79883 7968

1172 Terr. Mag., Vol 9, p. 140/

1190

1191 1935FR French North Africa, Morocco 1935D 1 79692 7978

1192 Manuscript from Annales de Physiques du Globe de la France d'Outremer 2nd

1193 year, June 1935/

1200

1201 1938MA Madagascar 79788 8000

1202 Annales Geologiques du Service des Mines Fasc IX*Gouvernement General de

1203 Madagascar et Dependances/

1220-

1221 1927US Spitzbergen (Svalbard) 1927D H 1 81700 817C

1222 Terr. Mag. 32, p. 148*Cambridge University Expedition July-Aug 1927/

1240-

1241 1908US South of New Zealand 1907 1 82345 8236

1242 Terr. Mag. 13, pp. 65-88*Observations in 1907 in islands south of NZ/

1260

1261 1949SP Spain 1948D H 1 82631 8264

1262 Manuscript of letters from Instituto Hydrographico, Spain/

1270-

1271 1948DA Denmark 1945D 1 82645 8265

1272 Magnetisk Aarbog - Iste Del: Danmark (undtagen Gronland)*Aunuaire

1273 Magnetique - 1ere Partie: Le Danemark (excepte le Groenland)/

1280-

1281 1927FI Finland 19161918D 1 82656 8285

1282 Bericht uber die im Sommer 1918, 1917 und 1918 im westlichen Finnland und

1283 in den sudwestlichen Finnischen Scharden ausgefuhrten erdmagnetischen

1284 Beobachtungen*E.A. Hintikka/

1300

1301 1930FI Baltic Sea 19281929 1 82887 8299

1302 Copy taken from Topo-Hudrograafia Aastaraamat 1928-1929*Consolidation of

1303 pp. 41-43, 45-47, 49-51, and 53-55/

1340

1341 IT Italy 1948DIH 1 83475 8351

1342 Manuscript: Stazione magnetiche fondamentali eseguite nel periodo 1947-4_

1343 Valori al 1948.O*Istituto Geografico Militare, Divisions Geodetica/

1350-

1351 1924FI Finland 1915D 9 83520 8355

1352 A magnetic survey of North Finland 1915.5-J. Keranen/

1360-

1361 1911FI Finland 1911DIH 1 83552 8384

1362 Field data file: 50 land distribution stations observing DIH - Finland/

1370-

1371 1918FI Finland 1912D 1 83651 8372

1372 Resultate magnetischer Beobachtungen im Jahre 1912-J. Keranen/

1380-

1381 1917FI Finland 1913DIH 1 83737 8377

1382 Results of magnetic observations in 1913-J. Keranen/

1390*

13911glTFI Finland I914DIH 1 83772 8380

1392 Results of magnetic observations in 1914 in North Finland*J. Keranen/

1400-

1401 1917FI Finland 1915D 1 83806 8383

1402 Results of magnetic observations in 1915 in North Finland*J. Keranen/

1410-

1411 1921FI Finland 1916DIH I 83841 8387

4O
1412 Results of magnetic observations in 1916 in Finnish Lapland*J. Keranen/

1420-

1421 1925FI Finland 19171923DIH 1 83875 8396

1422 Results of magnetic measurements in years 1917,1918,1922,1923-J. Keranen/

1430-

1431 1920FI Finland 19121914DIH 1 83971 8411

1432 Ergebnisse erdmagnetischer Beobachtungen*Vilho Vaisala/

1440-

1441 1921FI Finland 19131915DIH 1 84116 8436

1442 Ergebnisse erdmagnetischer Beohachtungen*Yrjo Vaisala/

1450-

1451 1926FI Finland 19151918DIH 1 84363 8449

1452 Ergebnisse erdmagnetischer Beobachtungen*Vilho Vaisala/

1470

1471 IT Italian possessions DIH 64579 8461

1472 East Africa, Somaliland, Eritrea*Misure magnetiche e confronti

1473 magnetimetrici a Terracina*Alcune misure magnetiche esegulte nell'Est

1474 Africa Inglese e nella Somalia Italians, pp. 28,33,37*Misure magnetiche

1475 in Eritrea, p. 75-AII by Luigi Palazzo and bound in one volume/

1480

1481 19301T Italian Somaliland (Somalia) D 1 84616 8463

1482 Memorie del R. Ufficio Centrals di Meteorologic e Geofisica Serie III,

1483 Vol. II, p.48/

1490-

1491 1920BE Belgium DIH I 84634 8477

1492 Annales de l'Observatoire Royal de Belgique Nouvelle Serie, Physique du

1493 Globe, Tome VI Fasc III/

1500-

1501 1931BE Belgium DIH I 84774 8496

1502 Nouvelle carte magnetique de la Belique*M Dehalu & Marie Merken/

2010-

2011 1947UR USSR 19311942DIHXYZFI 510000 53118

2012 Compound systematic catalogue of magnetic determinations of the general

2013 magnetic survey of the USSR 1931-1942*Scientific Research Institute of

2014 Terrestrial Magnetism/

2020

2021 19491T Afghanistan 19251948DIH 531189 53121

2022 First magnetic determinations in Afghanistan*Edward Stenz*Geofisica Pura

2023 e Applicata, Vol. XV, Fasc. 3-4, pp. 181-185/

2030*

2031 1933AU Austria 1930 IH Z 1 531212 53131

2032 The distribution of the geomagnetic force in Austria for 1930-A Schedler

2033 M Toperczer*Zentralanstalt Met. Geodynamik, Publ. No. 138/

2050*

2051 19503P Spanish possessions DIH 531330 53148

2052 Carts Nacional de Declinaciones Magneticas*D J Cubillo Fluiters/

2060*

2061 1950JA Japan 1945DIH 531286 53162

2062 Magnetic surveys of Japan and spherical harmonic analysis of the field*

2063 S. Sano*Hydrographic Div., MSA, Tokyo/

2070*

2071 1944ARArgentina D 1 531631 53183

2072 Carts Isogonica de la Republica Argentina*Servicio Meteorologico Nacional

2080*

2081 19503F South Africa DIH Z 1 531836 53188

2082 Results of observations at the secular variation field stations*Dept of

2083 Lands, Trigonometric Survey Office, South Africa/

2090

2091 1952FR France 1952D 1 531884 53229

2092 Annuaire pour l'an 1952*Bureau des Longitudes/

41
2100

2101 IN India 19481949D 1 532292 53229

2102 Survey of India*Technical Report 1948-49, Part III, p. 90/

2110.

2111 1951NL Netherlands 1945D H Z 1 532296 53268

2112 Geomagnetic field of the Netherlands reduced to 1945.J. Veldkamp*No. 134-

2113 Koninklijk Nederlands Meteorologisch Instituut/

2120

2121 1952 Mozambique 19501951D 1 532693 53270

2122 Letter to C & GS dated May '52 from Chief, Servico Meteorologico de

2123 Mocambique*Obsy. Campos Rodrigues, Lourenco Marques/

2130

2131 SF South Atlantic, Indian Ocean 1950D 4 532703 5327C

2132 Letter from Hermanus Observatory/

2140

2141 1952 Turkey 1951D I 532710 53271

2142 Letter to American Military Aid Misson HQ from Turkish Ministry of

2143 National Defence/

2150-

2151 1950NZ New Zealand 1950DIH 1 532715 53272

2152 Letter dated 21 Aug 1950 from Christchurch NZ/

2160

2161 1951NZ New Zealand 1951DIH 1 532727 53274

2162 Letter received from NZ 7 Dec 1951/

2170=

2171 1951JA Japan 19481951DIH 1 532747 53281

2172 Bulletin of Geographical Survey Institute Vol II Parts 2-3, June 1951/

2190

2191 1951JA China 19401942D 1 532816 53303

2192 Detached _rom letter received 3-12-51*Geographic Survey Institute, Japan/

2210

2211 1951FR French Morocco 1950D 1 533042 53304

2212 Bulletin d'Information March 1981, pp. lO0-101*Servlce Central

2213 Hydrographique, Comite d'Oceanographie, Paris/

2230

2231 TH Thailand 19431945DIH 1 533061 53308

2232 Report of operations of Royal Survey Dept., Ministry of Defence for

2233 1943-44 and 1944-45, pp. 29-31/

2240

2241 1951IN India, Ceylon 1950D H 1 533084 53309

2242 Technical Report Survey of India Part III Geodetic Work/

2270*

2271 1951CG Zaire 19361937DIH 1 533149 53323

2272 Resultats des observations magnetiques. Carte Magnetique de Congo Belge.

2273 L. Hermans*Institut Royal Colonial Belge, 1951, Fasc. IV/

2280

2281 1911FRAntarctica 19031905DIH 1 533234 53324

2282 Expedition Jtntarctique Francaise, J. Charcot - Leader*Geophysics data_

2283 Matha & Rey/

2300*

2301 1950MX Mexico DIH Z 1 533318 55345

2302 Servicio Geomagnetico. Elementos magneticos en la Republics Mexicans.

2303 Rosendo O. Sandoval*Instituto de Geofisica Universidad Nacional de Mexicc

2330

2331 US Canada 19471949D 1 533567 53358

2332 US Lake Survey*From Processing Unit Registry cards/

2360

2361 RP Pacific Islands D 533719 53373

2382 Philippines, Saipan, Marshall Island*From Processing Unit Registry cards/

2440

42
24411910AR Antarctica 19081910 IH 1 533998

2442 Relaciones preliminares of the work executed in the Amtarctic*Dr. Charcot

2443 Boletin Instituto Geografico Argentino Tomo XXIV No 1A 12*Also data from

2444 obsolete sources 220 & 226/

2450*

2451 1945N0 Norway 19381941DIH Z 1 533999 53412

2452 Magnetic survey of Norway 1938-41/

2480

2461 1933GE Antarctica 19321933DIH 1 534128 53433

2462 Schriften der Konigsberger Gelehrten Gesellschaft neuntes Jahr 1932-33-

2463 Erdmagnetische Messungen wahrend der Deutschen Antarktlschen Expedition*

2464 E. Przybyllok/

2470*

2471 1938US Arctic 1937DIH 1 534337 53436

2472 Terr. Magn. Atmos. Electr., Vol 43, p. 335, Sept 1938/

2480

2481 1953NZ South Pacific 1952DIH 1 534364 53437

2482 Letter dated 23 Jan 53 from Director Dept Scientific & Industrial

2483 Research*Magnetic Survey*Christchurch New Zealand/

2490*

24911gS2NZ New Zealand DIH 1 534379 53444

2492 Magnetic secular variation in NZ*A. G. Cullington*New Zealand Journal of

2493 Science and Technology, Section B, Vol 33, No. 5, March 1952/

3010-

3011 1927SP Spain I924DIH 1 534851 54013

3012 Mapa Magnetico de Espana para la Epoca de 1924*Direccion General del

3013 Instituto Geografico y Catastral de Esp_ua/

3020*

3021 1933FI Finland 1930DIH Z 1 540137 54117

3022 A magnetic survey of Finland on 1 July Ig30*J. Keranen*Finnish Met Inst/

3030

3031 19205W Antarctica 19011903D_q 1 541176 5411g

3032 Erdmagnetische Ergebnisse*Kurt Molin*In Schwedischen Sudpolar Expedition*

3033 Vol 1Geographie, Hygiene und Erdmagnetismus*Lithographisches Ins des

3034 Generalstabs/

3040*

3041 1983CA Canada 19381952DIH Z 541191 54171

3042 Data came in mail from the Dominion Astronomer about 07-03-53/

3050*

3051 1952AR Argentina 1952DIH 541716 54172

3052 Results of geomagnetic investigations in the Tierra del Fuego section of

3053 Patagonia*Leonidas Slaucitajs*Astronomical 0bsy of the City of Eva Peron/

3080*

3061 1952Y0 Yugoslavia 194gD 541727 54178

3062 Measurement of magnetic declination of the Yugoslav area of the Adriatic

3063 Sea in Ig49*Goldberg, Baturic et al.*Yugoslav Academy of Sciences & Arts,

3064 Vol. 1, No. 2/

3070

3071 US USA, Canada 1953D 541789 54181

3072 US Lake Survey in 1953/

3080*

3081 1953UG Uganda and vicinity 19081909DI 541816 54187

3082 Observations magnetlques ala frontiere du Congo Belge et de l'0uganda

3083 entre les latitudes I I0 N & Set en plusieurs points de l'0ugamda

3084 et du Kenya*M. Dehalu*Institut Royal Colonial Belge/

3090*

3091 1953JA Japan 1951DIH 541871 5418g

3092 Bulletin of the Geographical Survey Institute Vol III Parts 2-4*Ministry

3093 of Construction/

3100

43
3101 US West Indies, Central _ South America

3102 700 observations mostly from US Navy sources/

3110

3111 US Alabama

3112 Registry cards (USGS)*572001-572003*715001-715005/

3120

3121 US Arizona

3122 ReEistry cards (USGS)*572201-572208*725006-715010.

3123 Destroyed 300380-300396/

3130

200001 20083

300001 30024

300247 30045

3131 US Arkansas 300455 30064

3132 Registry cards _JSGS)*b72401-572403*715011-715019.730883-730884/

3140

3141 US California 300541 30152

3142 Registry cards (USGS)*572602-572641*715020-715056.730885-730888/

3150

3151 US Colorado 301526 30177

3152 Registry cards (USGS)*315528-315529*715082/

3160

3161 US Connecticut 301775 30184

3162 Registry cards (USGS)* 315511-315521/

3170

3171 US Delaware 301848 30191

3172 Registry cards (USGS)*568400-568401/

3180

3181 US District of Colombia 301915 30193

3182 Registry cards (USGS)*315530-315531/

3190

3191 US Florida 302000 30237

3192 Registry cards (USGS)*572815-572831*301933-301999.533487-533491.

3193 715095-715131*730889-730896*729635/

3200

3201 US Georgia 302376 30270

3202 Registry cards (USGS)*573001-573008*715132-715142.730898-730899./

3210

3211 US Idaho 302701 30282

3212 Registry cards (USGS)*573201*533517*715143-715164/

3220

3221 US Illinois 302823 30311

3222 Registry cards (USGS)*573404*533483-573404*715165-715174/

3230

3231 US Indiana 303114 30338

3232 Registry cards (USGS)*573601*533668-533669.533690.715175-715178/

3240

3241 US Iowa 303386 30369

3242 Registry cards (USGS)*533482*715179-715180/

3250

3251 US Kansas 303693 30400

3252 Registry cards (USGS)*574001-574016*715181-715197.533464-533465.315532.

3253 533691-533693/

3260

3261 US Kentucky 304010 30422

3262 Registry cards (USGS)*574201-533485.715198-715202/

3270

3271 US Louisiana 304230 30449

3272 Registry cards _JSGS)*574401-574411*715203-715207/

3280

3281 US Maine 304492 30460

3282 Registry cards _JSGS)*304609-304737.588710-568715.533500-533783.

3283 715209-715245*730900-730904/

44
3290

3291 US Maryland 304740 30507

3292 Registry cards (USGS).533699-533700*715246-715254*730905/

3300

3301 US Massachusetts 305075 30532

3302 Registry cards (USGS)*568901-568905*715255-715258*533789/

3310

3311 US Michigam 305330 30571

3312 Registry cards (USGS).533471-533704*715259-715268*730906-730907/

3320

3321 US Minnesota 305716 30600

3322 Registry cards (USGS).304606*533615-533616*533705*730908/

3330

3331 US Mississippi 306009 30623

3332 Registry cards (USCS).574601-533475-533478=715269-725284/

3340

3341 US Missouri 306240 30661

3342 Registry cards (USGS).574803-574805*533480-533481*715285-715296*

3343 730909-730910/

3350

3351 US Montana 306617 30688

3352 Registry cards (USGS).575003-575006*533518-533709*715297-715304*

3353 730911-730917/

3360

3361 US Nebraska 306883 30706

3362 Registry cards (USGS).575201-575203*715305-715312/

3370

3371 US Nevada 307070 30724

3372 Registry cards (USGS).533510-533512*533710*715313-715326/

3380

3381 US New Hampshire 307247 30732

3382 Registry cards (USGS).307330-307334*569101-569102*715327-715329*703916/

3390

3391 US New Jersey 307335 30752

3392 Registry cards (USGS)*715330-715332/

3400

3401 US New Mexico 307529 30774

3402 Registry cards (USGS).575502.533461*533711*715333-715346/

3410

3411 US New York 307747 30817

3412 Registry cards (USGS).533504-533713*569203-569209*715347-715354*

3413 730918-730919/

3420

3421 US North Carolina 308179 30866

3422 Registry cards _USGS)*569301*533497*715355-715364/

3430

3431 US North Dakota 308668 30882

3432 Registry cards (USGS)=533470*533714-533715=715365-715370*730920-730923/

3440

3441 US Ohio 308830 30906

3442 Registry cards (USGS).569401-569405*533643-533647*715371*715374/

3450

3451 US Oklahoma 309064 30922

3452 Registry cards (USGS).575701-57512*533462-533463*715375*715386*

3453 730924-730927/

3460

3461 US Oregon 309230 30953

3462 (USGS)*309227*309222*309224*575802-575805*715387-715398*533516*533716*

3463 533801-533806/

3470

45
3471 US Pennsylvania 309538 3098C

3472 Registry cards (USGS)*569502*533505*533648*533670-533671.715400.730928/

3480

3481 US Rhode Island 309813 30985

3482 Registry cards (USGS)*533499*533672*533781*715401.730929/

3490

3491 US South Carolina 309857 31002

3492 Registry cards (USGS)*569701-569705*533494-533495.715402-715410/

3500

3501 US South Dakota 310028 31019

3502 Registry cards (USGS)*575901-575902*533468-533469.533717-533718.

3503 715411-715415*730930-730932/

3510

3511 US Tennessee 310201 3104C

3512 Registry cards (USGS)*715416-715436/

3520

3521 US Texas 310403 31109

3522 Registry cards _35GS)-576101-576116-533457-533460-533673.576101-576116.

3523 715437-715477/

3530

3531 US Utah 311093 31130

3532 Registry cards (USGS)*576301 *533674-533675*715478-715492/

3540

3541 US Vermont 311301 31155

3542 Registry cards (USGS)*533523*533679-533680*715493.715574.730933.730935/

3550

3551 US Virginia 311555 31189

3552 Registry cards (USGS)*533486*533676-533678*533784-533788.569898-569900.

3553 715510-715520*730936/

3560

3561 US Washington 311894 31254

3562 Registry cards (USGS)*576501-576587*576588*533515.533681-533682.

3563 533790-533804*715521-715559/

3570

3571 US West Virginia 312550 31266

3572 Registry cards (USGS)*715560-715561/

3580

3581 US Wisconsin 312671 31298

3582 Registry cards (USGS)*576701*533618-533666.715562-715563.730937-730939/

3590

3591 US Wyoming 312965 31312

3592 Registry cards (USGS)*533466-533467*533683-533fiSt.7155f14-715573.730940/

3600

3601 US Alaska 313145 31553

3602 Registry cards (USGS)*533807-534453*550213-550215.793500-793502.

3603 570101-570740*715701-715811/

3610

3611 US Hawaii, Saipan (Palau Islands) 315122 31550

3612 Registry cards _3SGS)-599503-715850-715865.315094-315121.315084-315093.

3613 594300.3/

3620

3621 US Puerto Rico 19561957 315358 31537

3622 Registry cards (USGS)*599501-599502/

3630

3631 US Worldwide 19471957 594321 59433

3832 Registry cards*C & GS observations*594323-594333/

3640

3641 US Mexico, Central & South America 19421963 737137 7375g

3642 Registry cards*IAGS observations*533049-533927/

3750*

45
3751 1953N0 Norway 1950D H Z 1 542662 54391

3752 Letter dated 15 Oct 1953 from Director Norges Sjokartverk/

3760

3761 1953 Arctic 19521953D 543911 54436

3762 Letter to Director C&GS dated 27 Oct 53-H. B. Lamdsberg*Geophysics Res

3763 Directorate, Air Force Cambridge Research Center/

4010

4011 1952PL Poland 1949DIH Z I 550001 55002

4012 Contributions to knowledge of secular variation of earth ma_netism in

4013 Polsmd.Panstwowy Institut Geologiczny Biuletyn 82*Wydawniciwo PanstwoweEc

4014 Inst. Geologicznego/

4020

4021 1952BR Brazil 1953D 1 550101 5501C

4022 Annuario pare o ano de 1953*Observatorio Nacional*Ministerio da Educacao

4023 e Saude/

4030

4031 1953CH China 19301948D 1 550401 55116

4032 Magnetic data of China*Geodetic Survey Party, Survey Dept., CSF, NGRC*

4033 Dates actually 1930,1932,1936-1948/

4040

4041 US Philippines 19381940D 550151 55018

4042 Registry cards (USGS)/

4050

4051 US Northern Hemisphere 19431952D 550101 55022

4052 Registry cards (USGS)*Camada, Greenland, Alaska, Marshall Is, Antarctica/

4060

4061 19541N India 1949D I 550301 55030

4062 From letter dated 18 Jan to Director USCGS from Director Geological

4063 Survey of India/

4070

4071 1943IT Italy 19371938DIH 1 550351 55035

4072 Missione geologica delI'AGIP (Azienda Generale Italiana Petroli) Vol II*

4073 Misure astronomiche e geofisiche nella Dancalia Meridionale e nell'

4074 Hararino/

4080

4081 1957UK Oceans worldwide 19421957D H Z 14 590001 59051

4082 Received from the Astronomer Royal UK in 1955 and 1957. Observations

4083 cover the period from 1942 thru 1957*Data are manuscript copies*They cove

4084 ocean and other water areas throughout the World plus land observations

4085 mostly on islands*See also Source 551/

4100-

4101 1949JA Japan 19121951DIH Z 1 554201 55424

4102 Magnetic survey of Japan-Dates actually 1912, 1942, 1950, 1951/

4110

4111 1954JA Japan 19521953DIH 1 554401 55458

4112 Second order magnetic survey of Japan/

4120

4121 1957JA Japan 19531955DIH 554701 55509

4122 The second order magnetic survey of Japan (2)/

4130

4131 ID Indonesia 19491950D 555201 55521

4132 Data were on a typed sheet in Field Data file and were probably received

4133 from the Meterological and Geophysical Service in Djakarta/

4140

4141 1948FR French Morocco

4142 Annales Tome 14/

4150

4151 1940DA Greenland

4152 Meddelelser om Gronland Vol 107*J Olsen/

4160

1948DIH 555401 5554C

1931DIH Z 1 555601 55562

47
4161 SF Union of South Africa 19541956D 555859 55586

4162 Survey Office of Union of South Africa, received in letter/

4180-

4181 1956AR Antarctica 19511956D H Z 556201 55623

4182 Mediciones geomagneticas en la region de la Peninsula Antarctica, islas

4183 adyacentes y Mar de Weddell en 1951-1956.L. Slaucitajs/

4190

4191 1949 Lithuania, Baltic Sea 1940DIH Z 556401 55665

4192 Erdmagnetismus in Litauen epoche 1940.5*Saldukas/

4220*

4221 1955BR Brazil 19521954DIH 557001 55700

4222 Preliminary report on the installation of the Tatuoca Magnetic Observator

4223 *Lelio I. Gama/

4230

4231 1955 Venezuela 19521954DIH 557103 55714

4232 Informe que presenta la delegacion de Venezuela a la VII Reunion

4233 Panamericana de Consulta sobre Cartografia/

4240

4241 1953 Tunisia 1950D 557301 55733

4242 Annuaire Meteorologique et Geophysique, Univ. d'Algers p. 62*G. Grenet/

4250*

4251 1953 Ireland 1950DIH 557501 55754

4252 The magnetic survey of Ireland for 1950.5*Thomas Murphy*Dublin Institute

4253 for Advanced Studies/

4260

4261 1953M0 Morocco 19331952D 555863 55586

4262 #Lnnales Hydrographique, Paris I953*Actual dates are 1933,1951,1952/

4270

4271 1954NZ New Zealand 1950DIH 557701 55770

4272 The geomagnetic field in New Zealand at epoch 1950.5, p. 25*New Zealand

4273 Dept of Scientific and Industrial Research/

4280*

4281 1919UK British Isles 1915DIH Z 1 557901 55809

4282 Philosophical Transactions Series A Vol 219, pp. 30-43*Royal Society of

4283 London/

4290

4291 1955MA Madagascar 19081953D 1 558501 55851

4292 Quelques mesures de la declinaison maEnetique dens le sud et l'ouest de

4293 Madagascar, pp. 3-5, ll-14*Service Geologique, Tananarive/

4300

4301 1955MA Madagascar 19541955D 1 558701 55873

4302 Nouvelles mesures de la declinaison magnetique Madagascar, pp. 4,11*Louis

4303 Cafitala*Service Geologique, Tananarive/

4310

4311 1955GE Germany, Austria, Switzerland DIH Z 1 558901 55893

4312 Erdmagnetische Messungen am Bodensee*F Burmeister*Deutsche

4313 Geodatische Kommission/

4320

4321 195506 Zaire 19401951D 1 559101 55919

4322 Triangulation du Katanga, pp. 259-262-J van der Straeten*Special Committe

4323 of Katanga, Series A, Fasc. 6/

4330*

4331 1955N0 Norway 19421950D H Z 1 559401 56047

4332 A magnetic survey of Norway II*Magnetisk Byra and Norges Sjokartverk/

4340

4341 1956AG Algeria, Libya, Morocco, Tunisia 19471952DIH Z 1 560601 56092

4342 Travaux de l'Institut de Meteorologie et de Physique du Globe de l'Algeri

4343 Fasc. 14, pp. 29-58*Universite d'Alger/

4350

4351 1932MA Madagascar 19001921DIH I 561101 56125

48
4352 Magnetisms de Madagascar, Vol 4, pp. 27-134*Elie Colin & Charles Poisson/

4360

4361 CZ Czechoslovakia 19461951DIH 1 561403 56159

4362 Geofysikalni Sbornik*Geophysical Institute of the Academy of Technical

4363 Sciences, pp. 220-233/

4370

4371 1934AR Argentina 1934D 1 561801 56190

4372 Guia Aeronautlca, pp. 177,178/

4380

4381 1954SF Antarctica, South Atlantic 19541955D 4 558301 5583C

4382 Antarctic data from Dec 1954 Geographical Journal*South Atlantic data

4383 from a letter from Hermanus giving ship results/

4390

4391 1939MA Madagascar 19351938D H Z I 562101 56237

4392 Le nouveau reseau magnetique de Madagascar, pp. 9-50*Henri Besairie*

4393 Tananarive/

4400*

4401 19533F South Africa 19521953DIH Z 1 562501 56255

4402 Progress Report, 1953, pp.6-10.Trigonometrical Survey Office of the Uniom

4403 of South Africa/

4410

4411 1954Y0 Yugoslavia 19071954DIH 1 563001 56300

4412 Geologija Razprave in Porcila, pp. 228,231*Years of o56 1907,1918,1954/

4420

4421 1939UR USSR 19241934DIH 1 562701 56272

4422 From Russian putlication/

4430

4431 1957PL Poland 19571) 1 562901 56292

4432 Rocznik Astronomiczy, p. 67/

4440

4441 1948GE Germany 1935DIH Z 1 563201 55375

4442 Magnetische Reichsvermessung 1935.0, pp. 24-32*BocA, Burmeister _ Errulat

4443 Geophysical Institute of Potsdam/

4450

4451 1948GE Baltic Sea 19041938D 563901 56409

4452 Deutsche Hydrographische Zeitschrift*Errulat/

4460

4461 Estonia, Baltic Sea 1936D H Z 1 564301 56462

4462 Die magnetische Aufnahme Estlands/

4470*

4471 1944US Norway 1944D I 564801 56553

4472 Atlas of Magnetic Declination of Europe 1944.5-R. BocA*Army Map Service/

4480*

4481 1944US Finland 1944]) 1 565701 56587

4482 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4490*

4491 1944US USSR 194419 1 577001 57872

4492 Atlas of Magnetic Declination of Europe 1944.5-R. BocA*Army Map Service/

4500*

4501 1944US Estonia 1944/) 1 566000 56615

4502 Atlas of Magnetic Declination of Europe 1944.5-R. BocA*Army Map Service/

4510-

4511 1944US Latvia 1944/) I 566301 5668C

4512 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4520*

4521 1944US Poland 1944/) 1 567000 56769

4522 Atlas of Magnetic Declination of Europe 1944.5-R. Book*Army Map Service/

4530

4531 19527H Thailand 19511952DIH 1 567801 55781

4532 From 1951-1952 Thailand putlication/

49
4540

4541 US Greenland & Arctic 1955D H I 568000 56811

4542 Observations on Fletcher's Ice Island and Thule*0btained by US Air Force/

4550

4551 NZ Pacific 1953D 4 570901 5709C

4552 Observations made by New Zealand and obtained by letter/

4560

4561 US Greenland 1955D 1 578901 57893

4562 Registry cards (USGS)* US Army Corps of Engineers/

4570*

4571 1954FRAntarctica 19511952DIH Z 1 579101 57912

4572 Terre Adelie 1951-52, Magnetisme Terrestre, Fasc. I, pp. 99,111,115-

4573 Mayaud/

4580*

4581 1944US Germany 1944D 1 590601 59295

4582 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4590*

4591 1944US Netherlands 1944/) 1 593001 59308

4592 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4600

4601 Mozambique 19391949DIH 14 593101 59313

4602 Observations made on land and sea in Portuguese East Africa area/

4670*

4671 1957DA Australia 1952DIH 1 593301 59334

4672 From Australian publications, photostat sheets obtained from Chief of

4673 Naval Operations. IAGA Bulletin No. 15, pp. 94-98/

4680

4681 US Worldwide 19341957 O

4682 Observatory values/

4690*

4691 Sudan 1952D H 1 595401 59541

4692 D & H observations

4700*

4701 Falkland Islands 19261949D 1 595451 59553

4702 Charts Section, 83 stations/

4710-

4711 Poland 19251926D H Z 1 595601 59564

4712 Observations made in Free State of Danzig/

4720*

4721 1957N0 Svalbard (Spitzbergen) 19001957DIH Z 595671 59571

4722 Photostat of pages from Magnetic Observations in Svalbard 1596-1953-

4723 Karre Z. Lundquist*Norsk Polar Institutt Skrifter No II0/

4730*

4731 1949UK Great Britain 1948D 595731 59578

4732 55 stations, D values only*Magnetic survey work 1947-49*T H 0'Beirne,

4733 Ordnance Survey (MS)/

4740*

4741 1958JA Prince Harald Coast, Antarctica 19571958DIH Z 595801 5958C

4742 Positive photostat of a typed page/

4750

4751 UKWorldwide 19491958 595851 59596

4752 Observations taken from miscellaneous sources including recent

4753 observations by H M ships (various British sources)/

4760*

4761 1944US France 194419 1 596001 59678

4762 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4770*

4771 1944US Italy 1944/) 1 596801 59709

4772 Atlas of Magnetic Declination of Europe 1944.5-R. Bock*Army Map Service/

4780*

5O
4781 1944US Turkey 1944/) 1 597111 59713

4782 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4790*

4791 1944US Greece 1944D 1 597151 59728

4792 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4800*

4801 1944US Romania 1944D 1 597301 59748

4802 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4810-

48111g44us Great Britain 1944]) 1 597501 59750

4812 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4820*

4821 1944US Austria 1944D 1 597511 59819

4822 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4830*

4831 1944US Belgium 1944/) 1 598221 59843

4832 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Service/

4840*

4841 1944US Czechoslovakia 1944]) 1 598451 59857

4842 Atlas of Magnetic Declination of Europe 1944.5-R Bock*Army Map Servxce/

4850*

4851 1957AR Antarctica 19021956DIH Z 1 598601 59877

4852 E1 conocimiento geomagnetico de la Antartida Sud Americana*L. Slaucitajs/

4860

4861 US Arctic 1957]) 1 598821 59895

4862 D values for Fletcher'a Ice Island/

"4370

4871 P0 Worldwide 19521960DIH Z 1 598971 59899

4872 Values received from Portugal/

4880*

4881 Worldwide, Baltic Sea 19131959DIH Z 14 599022 59916

4882 Various worldwide observations*Magnetic measurements in the Baltic Sea,

4883 South Quarken, Helsinki, 1926-J Keranen & H 0delsio/

4890

4891 CA Canada 19531957D H Z 1 599201 5994C

4892 Magnetic results in Canada/

4900

4901 IN South India 19551956D H 1 599421 59944

4902 Observations on typed sheet received from India/

4910

4911 AS Australia 1945 19 315084 31512

4912 Contains some repeat observations. Letter of explanation with cards/

5000*

5001 US Worldwide I9641967DIH ZF2 2010001216128

5002 US Navy Hydrographic Office aeromagnetic observations from Project MAGNE_

5003 *Part I0-II(1964-1967)*In separate file/

5010

5011 CA Northern Hemisphere 19531963DIHXYZF2 700001 71256

5012Aeromagnetic observatlons*Missing years 1956,1962.In separate file/

5020*

5021 US Worldwide F5 800001

5022 Project Vanguard data. Also Alouette and Woomera*In separate file/

5030*

5031 1961CA British East Africa I959DIHXYZFI9 716001 71605

5032 Geomagnetic investigations in British East Africa during 1959*Whitham &

5033 Hoge*Some repeat observations and list of recommended repeat stations*

5034 pp. 82-85*Kenya, Uganda, Tanzania/

5040*

5041 1958JA Japan 19541955DIHXYZ 1 718100 71623

5042 The Bulletin of the Hydrographic Office, Vol XV, pp. 9-13*Results at

51
5043 repeat stations, pp. 16-23*Magnetic survey of Japan/

5050*

5051 1958 Philippines 1955DIH 1 716233 71627

5052 Magnetic declination in the Philippines in 1955/

5060*

5061 1960 Ireland 1959D H Z 9 716278 71628

5062 A magnetic survey of Ireland for 1959.5/

5070*

5071 1958FR Algeria 1956D H Z 1 716289 71635

5072 Annales de l'Institut de Physique du Globe Tome XXIX, pp. 123-128,135-14C

5080

5081 1930US Philippines 19291930D 1 716359 71635

5082 Results of magnetic observations made by the United States Coast and

5083 Geodetic Survey/

50go*

5091 1958EG Egypt (UAR) 19572) H Z 1 716392 71644

5092 Magnetic survey work in Egypt.M. Fahim & K. Weinert*Bull. No. 46, 1958/

5100

5101 1959CA Canada 19581959DIH ZFI 716433 7165C

5102 A summary of magnetic results of the 1958-59 field work in Canada/

5110

5111 MA Indian Ocean 1941D 4 716507 71652

5112 Tabulations were probably furnished by the Service Geographique de

5113 M_dagascar*0bservations in the vicinity of Cap Sainte-Marie/

5120

5121 1958FR Indian Ocean 1956DIH ZF14 716522 71653

5122 Annales Hydrographique 4eme Serle Tome 9*Madagascar, French Somaliland,

5123 KerEuelen Island/

5130

5131 FR Indian Ocean 19131926DI 716536 71654

5132 Observations in region of Madagascar*French Hydrographic Missions from

5133 1913-1926*Annales Hydrographiques, Vol. 70, 3rd Series, 1925-26/

5140-

5141 1905FR Christmas Island 19041948DIH 716548 71655

5142 Magnetic survey of Dutch West Indies in 1904*Terr. Magn., Vol. I0, p. 15-

5143 One D observation at St. Paul Island on 26 Dec 1948-1948 observation from

5144 Bulletin d'Information, lleme Annee, No. 1, Jan 1950, Service Hydro de is

5145 Marine*0nly years 1904, 1948/

5150-

5151 196OAS Australia 19531958DIH 716556 71668

5152 Isomagnetic maps of Australia for epoch 1957.5 Part 1 Eastern Australia*

5153 BMR Report No. 55/

5160

5161 AS Australia 19441958DIH 716687 71674

5162 Australian reoccupation magnetic stations 1944-1958 (typed list)/

5170

5171 1961PL Poland 19011958DIH 716750 7167_

5172 Proceedings of the Institute of Geodesy and Cartography Vol III*

5173 Observations of the net secular variation in Poland/

5180

5181 SF Atlantic 19581960D H Z 716791 7168C

5182 05servations off the coast of South Africa at 3 islands: Marion, Tristan

5183 da Cunha • Gough*Int. Hydro. Rev., Vol. 36, pp. 165-166 (1959); Trans.

5184 Roy. Soc. S. Africa, Yol. 36, Part 2, pp. 107-117*Missing year 1959/

51g0*

5191196OFR Corsica I953DIHXXZF 716801 71690

5192 Annales de l'Institut de Physique du Globe Tome X](X/

5200*

5201 1958FR France 19481956D H Z 716918 71693

5202 Annales de l'Institut de Physique du Globe Tome XXIX, 1958*Annales...,

52
5203 Tome XXIV, 1949, p. 87-1948 & 1956 only/

5210

5211 TH Thailand 19531954DIH 716939 71695

5212 Report on the operations of the Survey Dept of the Royal Thai Army,

5213 Ministry of Defence for the year 1953-54, p. 21/

5220*

5221 1930FR Pacific Ocean 19271929DIH 716951 71696

5222 Magnetic observations in French possessions in the Pacific during the

5223 cruise of the "Cassiopee", Annales de l'Institut de Physique du Globe de

5224 l'Universite de Paris, Vol. VIII, p. 144/

5230*

5231 1960AS Antarctica 19541959DIH Z 716970 71703

5232 Field magnetic observations in Antarctica*Australian Dept of National

5233 Development*Bureau of Mineral Resources Geology & Geophysics*Rept No. 51/

5240*

5241 1961NZ Antarctica 19571959DIH Z 717034 71707

5242 New Zealand IGY Antarctic Expeditions, Scott Base and Hallet Stations,

5243 Bulletin 140, pp. 62,63/

5250

5251 Ecuador 19561958D 717074 7171C

5252 Work was done by IGM Ecuador for Calif Ecuador Petroleum Co./

5260*

5261 19603R Brazil 19101931DIH 717102 71728

5262 Levantamentos Magneticos, No. 8, Rio de Janeiro/

5270*

5271 1960GE Bavaria (Germany) 1955DIH Z 717290 71797

5272 Magnetische Vermessung II 0rdnung yon Bayern 1955.0, pp.ll-21*

5273 F Burmeister/

5280

5281 1959CZ Czechoslovakia 19461958D H Z 717976 71816

5282 Geofysikalni Sbornik, No. 99-125*CzechoslovaJ¢ Academy of Sciences.

5283 Geophysical Institute*Only years 1958.0, 1946.5, 1955.0/

5290

5291 Indian Ocean 19341936D 4 718170 71826

5292 Compass observations made in the Indian Ocean by ships SS "Westmoreland"

5293 and SS "Royal Star"/

5300

5301 CA Canada 1961DIH ZF 718268 71829

5302 DIHZF observations from 25 stations/

5310

5311 1959JA Japan 1958DIH 718292 71831

5312 Observations on island of Okusiri Sima*H.O. Bulletin No. 60, June 1959/

5320*

5321 1960JA Japan 19421944DIH Z 718311 71631

5322 Some results from the magnetic survey of Japan 1942-1944-Buli. Hydrogr.

5323 Office, Japan, VoI.'XIV/

5330*

5331 1948GE Baltic Sea 19381939 H 718317 71633

5332 Measurements of the horizontal intensity of the Earth's magnetic field in

5333 the Baltic 1938 and 1939 with the plunged double compass/

5340*

5341 JA Japan, Indian & Pacific Oceans 19571960 F6 718340 72331

5342 Towed magnetometer survey of several tracks extending from Tokyo to Cape

5343 Town to Syowa Base (Antarctica)/

5350

5351 ID Indonesia 19601961D H Z 723315 72334

5352 List from Djawatan Meterologi*Dan Geofisk*Dept Perhubungan Upara/

5360-

5361 1961JA Japan 19511957DIH 723346 72346

5362 Bulletin of the Geographical Institute Vol VII, Part I, Oct 1961,

53
8363 pp. 19-79/

5370*

5371 1960AS Australia 1960D H Z 9 723467 72351

8372 Regional magnetic survey of Queensland and New South Wales*Bureau of

5373 Mineral Resources, Geology and Geophysics/

5380*

5381 1960FR France 19471958D H Z 723511 72354

5382 A nnales de 1'Institut de Physique du Globe de l'Universite de Paris, Tome

5383 X_, pp. 87,89-94*Annales...Tome XX_I, pp. 80-81,83-85_Annales...Tome

5384XXX, pp. 108-109,111-112*Actual years: 1947,1952-1953,1957-1958/

5390

5391 US Fletcher's Ice Island 19541959D 723549 72378

5392 Magnetic variation obtained on Fletcher's Ice Island T-3*Actual years:

5393 1054, 1957, 1058, 1959/

5400

5401 AS Australia 19121959DIH 723784 72390

5402 Isomagnetic maps of Australia for the epoch 1957.5 Part II, Central and

5403 Western Australia, Report No. 62*CIW 1012-1916*Bureau of Mineral

5404 Resources, Geology and Geophysics (or its forerunners)-Adelaide

5405 Observatory/

5410

5411 US Antarctica 1960 F2 723901 72398

5412 Aeromagnetic F values at 85 points*Project Deep Freeze 61, Ellsworth

5413 Highland Traverse, Flight of 12 Nov 1960/

5420

5421 AS New Guinea 19151957DIH 723986 72399

5422 DIH observations at 11 stations including 3 repeats*Dates from 1915, 1936

5423 19ST*Data from Report No 63*Dept of National Development*Australia/

5430

5431 US Pacific, Bering Sea 1960 F6 723997 72436

5432 Tabulated list of observed values of total magnetic intensity from the

5433 towed magnetometer survey CS-394 by USC&GSS "Surveyor"/

5440

5441 FR French West A_rica Ig531958DIH ZF 724385 72475

5442 Reseau general de bases magnetiques en Afrique Occidental*France, Office

5443 de la Recherche Scientifique et Technique Outre-mer./

5450*

5451 1962US Antarctica 19601961DIH ZF 724753 72479

5452 DIHFZ at 50 stations obtained durinK the Ellsworth Highland Traverse/

5460*

5461 1962US Antarctica 19601961DIH ZF 724800 72482

5462 Observations during the McMurdo to Pole Traverse by the USC&GS/

5470

5471 1961FR French West Africa, Madagascar 19301958 724824 72484

5472 Annales Hydrographiques*Service Hydrographique de la Marine*4eme Serie,

5473 Tome 10, 1959-60, pp. 28,60,80,97,103,111,147,218,237,244/

5480

5481 US Worldwide 190OI965DIHXYZFO 729623 72988

5482 Observatory values from Section Observatory files*In separate file/

5490

5491 FR Chad, Central African Republic 1956D H Z 724844 72497

5492 Reseau general de bases maEnetiques Republique Centrafricaine, Tchad

5493 Meridional*France, ORSTOM/

5500

5501 1961IT Italy 19581961 Z 724971 72511

5502 Pubblicazione, Nuova Serie N. 44-63, 1958-1961, p. 42*Istituto di Geodesi

5503 e Geofisica, Padova/

5510-

5511 UK Worldwide 19551961D Z 725117 72514

5512 Observations made by }{M Survey Ships at or near British possessions/

54
5520

5521 US Southern Hemisphere 19591962 F6 725115 72873

5522 Geomagnetic total field intensity readings, tabulated values, magnetomete

5523 observations*Lamont Geological Observatory/

5530

5531 US Pacific 1961 F8 728740 72883

5532 Observations from ship USS "Rehoboth"/

5540

5541 1962FI Finland 19461961 9 728838 72887

5542 Data received per letter from Finnish Meteorological Office

5543 (Nov 14, 1962)/

5550*

5551 1962GE Svalbard (Spitzbergen) 1957DIH 728875 72887

5552 Tagungsbericht Geomagnetismus und Aeronomie, p. 71*Institute of Potsdam/

5560

5561 US Arctic 19581960D H F 728880 72917

5562 Geophysical data from US Arctic Ocean Drift Stations, 1957-1960, pp. 183,

5563 187-227-AF Cambridge Research Laboratories/

5570

5571 1962 Antarctica 19571960DIH ZF 729178 72953

5572 Glaciological studies of the Ross Ice Shelf, Antarctica*A.P. Crary etal*

5573 IGY Glaciological Report No. 6, May 1962/

5580*

5581 1962BE Belgium 1960DEH ZF 729538 72962

5582 La distribution du champ magnetique terrestre en Belgique a l'epoque

5583 1960.5*Institut Royal Meteorlogique de Belgique/

5590

5591 US Pacific, South America, Caribbean 19031944DIH 730941 73101

5592 Results from photostats of Field Data file and cards from Processing

5593 Section*Observations made by officers of the US Navy Hydrographic Office/

5600*

5601 19625P Spain, Portugal 1960D H Z 731014 73335

5602 Relacion de valores magneticos de las estaciones referidos a 1960.0-

5603 Instituto Geograflco y Catastral de Espana, Servicio Meteorologico

5604 Nacional de Portugal/

5610-

5611 1963US Antarctica 19611962DIH ZF 733351 73338

5612 Antarctic Peninsula Traverse*Wasilewski*USC&GS/

5620

6621 1960JA Japan 19561957DIH 733384 73364

5622 GSI Bulletin of Japan, Vol VI, Part I, March 1960/

5630

5631 PL Poland 19371938 H Z 734956 73513

5632 Le leve magnetique de l'anomalie de Varsovie/

5640

5641 US Arctic 19601961 F2 735140 73666

5842 Aeromagnetic total intensity values*University of Wisconsin/

5650

5651 US Antarctica 1960 F2 736670 73713

5852 Aeromagnetic total intensity values*University of Wisconsin/

5660

5661 CA Canada 1962DIH ZF9 737107 73713

5662 Observations made in 1962 at Canadian Stations, also 13 repeat stations/

5870*

5871 1981UR Worldwide 19571960D H ZF4 733648 73495

5672 Observations from ship "Zarya" (Russlan)*751099-T52115/

5680

5681 1961USArctic 1961 F8 737592 73768

5682 Gravity and magnetic observations from Ice Island Arlis-II, 1 July to

5683 6 October IQOl*Values of F from proton magnetometer*University of

55
5684 Wisconsin Research Series/

5690

5691 Ghana 19571960D 737688 73774

5692 From the Chief Survey Officer*Ministry of Communications _ Works, Survey

5693 Division, Ghana/

5700

5701 1961 Peru 19581959 737744 73775

5702 Carte Geomagnetica del Peru - Epoca 1961.0/

5710

5711 Various 19571962 737754 7378C

5712 Misc. obsns: Pacific, Peru, Atlantic, West Indies, Canada, Ghana,

5713Antarctica/

5720

5721 US Ethiopia 19591960D 737805 73785

5722 Observations of D in the Blue Nile River Basin*USC&GS/

5730*

5731 UK Worldwide 19511963DIH ZF 737855 73809

5732 Manuscript copy from Great Britain of all observations in their files of

5733 data not in USC&GS listing/

5740

5741 US Chuckchi Sea (Arctic) 1962 F6 738096 73830

5742 F observations in the Chuckchi Sea by the Marine ship "Nowind"*University

5743 Wisconsin/

5750

5751 US Antarctica 19581961 F2 738309 73848

5752 Aeromagnetic F values*University of Wisconsin/

5760

5761 US Atlantic 19621963 F6 738489 73977

5762 Towed proton magnetometer observations made by the "Explorer" off East

5763 Coast of US and the West Coast of Africa/

5770

5771 US South Atlantic 1963 F6

5772 F recorded*Lamont Geological Observatory*Towed marine magnetometer survey

5773 from ship "Zapiola"/

5780*

5781 1963AS Australia, Antarctica 19601961D H Z 750568 75063

5782 Regional magnetic surveys in Australia and Australian Antarctica*BMR

5783 Record No. 1963-61/

5790*

5791 1964US Antarctica 19621963DIH ZF 750823 75084

5792 South Pole Traverse, Perkins/

5800

5801 Taiwam, Greenland 19361961DIH Z 750846 75085

5802 Misc. random observations/

5810*

5811 1970BE Antarctica 19571958D Z 750859 75087

5812 Expedition Antarctique Belge 1957-58 Vol III Geomagnetisme*Observations

5813 made at Roi Baudouin Observatory and on a traverse/

5820*

5821 1963 Iran 19611963DIH ZF 750873 75090

5822 Observations at Iranian stations*Inst. Geophys., Tehran University, Puhn.

5823 No. 12/

5830

5831 URAntarctica 1959D H Z 754130 75415

5832 Observations on the route Vostok-South Pole*USSR/

5840*

5841 1963URAntarctica 1957]) H Z 752116 75217

5842 Observations along the route from Pravda Beach to South Magnetic Pole*

5843 Geomagnetism and Aeronomy, Vol. 3, No. 3, 1963, Moscow/

5850*

56
5851 UK Worldwide 19621964D 752175 75228

5852 Observations made by British Weather Ships and aircraft in various areas

5853 of the world/

5860

5861 SF Antarctica 19601962D H Z 752269 7523C

5862 South A/rican Antarctic Scientific Records*Geophysical Series I/

5870*

5871 1964JA Japan 19591960D_I 752304 75236

5872 Magnetic survey of Japan for 1960.O-Japanese Hydrographic Office/

5880

5881 FR Guadeloupe (West Indies) 19631964 F6 752370 75242

5882 Magnetic survey of Guadeloupe Island*Elsec proton magnetometer*Dorel

5883 et al/

5890*

5891 1964 France I963DIH ZF 752423 75243

5892 WMS Notes, No. 2, Oct 1964/

5900

5901 P0 Portugal and territories 19581960D H Z 752438 75264

5902 205 observations made in the whole national territory of Portugal/

5910

5911 1960UR Central Arctic 19591960D H Z 752644 75289

5912 Observation data of the Scientific Research Drifting Stations Severnyy

5913 Polyus-6 and Svernyy Polyus-8*N A Milyayev/

592O

5921 AS Indian & Pacific Oceans 19151959DIH Z 752899 75290

5922 Regional magnetic stations on some islands in the Pacific and Indian

5923 Oceans 1957 and I959*Actual years-1915,1947,1957,1959/

5930

5931 SF Zambia, Union of South Africa 19611962DIH Z 9 752909 75297

5932 64 stations in total, 44 repeat stations/

5940

5941 1963GE Albania, Bulgaria, Romania 1961D H Z 752973 75298

5942 Gerlands Beitrage zur Geophysik, Band 72, Heft 4, 1963, pp. 201-207,268.

5943 Leipzig*German Academy of Sciences/

5950

5951 AS Papua New Guinea, Australia 1962D H Z 9 752990 75302

5952 Observations from II field stations and 26 repeat stations*Dept of

5953 National Development/

5980

5961 1956FR French West & Equatorial Africa 19471953DIH 753028 75307

5962 Annales Hydrographiques, 1955-56, pp. 191-213*Senegal, Ivory Coast,

5963 Mauritania, Congo/

5970

5971 1963US Fletcher's Ice Island (Arctic) 1961 F 753076 75308

5972 Geomagnetic observations on Fletcher's Ice Island (T-3)*AFCRL-63-615/

5980*

5981 1963BE Belgium 19521957D HXYZF 753082 75377

5982 Lee anomalies magnetiuqes de la Belgique. De magnetische anomalie van

5983 Belgie. Series A, No. 38-A de Vuyst/

5990*

5991 1965US Antarctica 19631964DIH ZF 753773 75380

5992 Filchner Ice Shelf Traverse, 1963-1964-M Phelan (USC&GS)/

6000

6001 US Worldwide

6002 Project MAGNET data*In separate file/

6010

6011 CA Northern Hemisphere

6012 Canadian airborne data*In separate file/

6020

6021 CA Canada

DIH ZF2

DIHXYZF2

1963DIH F9 753802 75382

57
6022 Canadian field observations for 1963*Includes 7 repeat stations/

6030

6031 UK Indian Ocean Ig62D 4

6032 British ship "Mallard"/

6040

6041 Worldwide 19131963DIH Z 753866 75389

6042 Misc. file which includes IGY observatories and Haldde Observatory/

6050

6051 US US East Coast, Caribbean 1962 F6 754153 75487

6052 Observations with a towed magnetometer from ship "Explorer"*Lines C _ D.

6053 Course from Norfolk to Puerto Rico/

6060

6061 FR Africa, Pacific Islands 19511955DIH 754876 75495

6062 Bulletin d'Information*Comite Central d'0ceanographie et d'Etude des

6063 Cotes*Service Hydrographique de la Marine/

6070

6071 Madagascar, East Africa 19021903DIH 754957 75496

6072 Observations in South East Africa and islands*Tanzania, Kenya, Madagascar

6073 Mozambique/

6080

6081 TH Thailand 19581965 754969 75560

6082 Manuscript copy*65 stations with observations - 10 repeat stations/

6090*

6091 1962JA Japan 19581961DIH 755007 75506

6092 Bulletin of the Geographical Survey Institute*Japan/

6100-

8101 1965FR Chad 1958DIH Z 755067 75707

6102 Equatorial electrojet in Chad*Annales de Geophysique, Vol. 21, No. 1/

6110

6111 GE Germany 19641965DIH ZF9 755075 75514

6112 Survey of Southern Germany up to latitude 50.5 degrees North/

6120

6121 UR Antarctica 1957D 755142 75515

8122 Magnetic observations by the Second Sea Expedition USSR*Soviet Antarctic

8123 Expedition*A N Tarasov/

8130

6131 CA Canada 1964 9 755151 75518

8132 Field results of observations made in Caaada*Includes 16 repeat stations/

6140

6141 Transylvania (Romania) 1943 IH 755181 75521

6142 Observations made in Sept and 0ct 1943.0 Gyalla Observatory/

6150

6151 AS Australia 1962D H Z 755211 75538

6152 Regional magnetic surveys in Australia, Australian Antarctica and the

6153 Territory of Papua and New Guinea/

8180-

8181 1939 Mozambique 1938DIH F 755381 75539

6162 Observations made in the area of Lourenco Marques, Mozambique/

6170

6171 Central America Ig621964DIH g 755396 75545

6172 Observations made by all the Republics of Central America, including some

6173 repeat stations*Guatemala, E1 Salvador, Honduras, Panama, Nicara6rua/

6180-

6181 19365W Sweden 19151933DIH Z 755601 75612

6182 Magnetic researches along the coasts of Sweden/

6190-

6191 1965AS Australia, Antarctica, Papua 1963D H Z 756124 75614

6192 Regional magnetic surveys in Australia, Australian Antarctica, the

6193 Territory of Papua and New Guinea during Ig63*BMR Record No. 1965-218/

6200*

58
6201 SF Antarctica 19641965 F6 756143 75639

6202 Measurements of total magnetic intensity during voyages of the "RSA",

6203 Dec 1964 to Apt 1965*South Africa, Hermanus Magnetic Observatory/

6210

6211 1965R0 Romania 19511961 756393 75683

6212 Valorile elementelor geomagnetice HIZ si F in Ardeal si Banat, la 1960.0-

6213 Studii si Cercetari, Tomul 3, No. I/

6220*

6221 1965UK Atlantic & Indian Oceans 19581962 F6 756834 75763

6222 Observations of F made by British (Cambridge University) with proton

6223 magnetometer towed astern of several ships*Manuscript copy received

6224 Oct 1965/

6230*

6231 1968US Antarctica 19641965 1 I 757632 75765

6232 South Pole to Queen Maud Land Traverse l-Norman Peddie (USC&GS)/

6240*

6241 SF Antarctica 19651966 F6 757660 75787

6242 Magnetic measurements of F by South Africa by "RSA" on relief voyage from

6243 Cape Town to Sanae/

6250*

6251 1968AU Austria 1960D H Z 757874 75806

6252 Observations from a land magnetic survey made during the years 1960-62/

6260

6261 SP Spain 19611964D H Z 9 758065 7581C

6262 Manuscript copy of observations of DHZ made at repeat stations in Spain/

6270

6271 UR Antarctica 1959D H Z 758107 75812

6272 Observations made by the Fourth Soviet Expedition on "Shackleton", on Wes

6273 Ice Shelf, on Mirnyy-Komsomolskaya Traverse & on Drygalski Island/

6280

6281 FR France 1984 F6 758128 75815

6282 Marine magnetometer observations of F by the "Amiral Mouchez" in the

6283 Gironde River/

6290

6291 1958 Turkey 19181951DIH 758152 7582C

6292 Magnetic measurements made in Turkey*O N Sipa_ioglu*Includes observations

6293 made before 1900/

6300

6301 CA Canada 19651966D H ZF9 758203 75823

6302 Observations made in Canada/

6310

6311 IT Italy 19591963D H 758237 75825

6312 Observations made in Italy as part of World Magnetic Survey*WMS Notes

6313 No. 3

6320

6321 1962UR Antarctica 1962D 758253 75826

6322 13 observations of D made in western Enderby Land by USSR*Soviet

6323 Information Bulletin No. 37/

6330*

6331 1964SF Antarctica 19631964 H Z 758266 75828

6332 Results of magnetic observations made at Sanae, 1963/

6340

6341 AR Argentina I9601985DIH Z 9 758282 75841

8342 Manuscript copy*0bservations made during survey of Argentina/

6350*

6351 1964FR Madagascar 19541962D H Z 9 758412 75852

8352 Observations made in Madagascar*0bservations from 0RSTOM France/

6360*

6361 1963BR Brazil 19531960DIH 758529 75859

6362 Rede magnetlca do 0bservatorio Nacional 1952-60, pp. 21-83-Lelio I Gama/

59
6370

6371 UK Worldwide 19601966D H ZF 758594 75864

6372 Worldwide observations received from the British/

6380* ..

6381 19621T Italy 19591962D H Z 758643 75868

6382 Atti del XII Convegno Annuals, Roma, 23-24 Nov 1962*Associazione Geofisic

6383 Italiama*Toscano Archipelago and Pontine Islands/

6390

6391 Tanzania 19651966 F2 758682 75874

6392 Unpublished manuscript copy*Observations from aeromaEnetic & ground

6392 surveys/

6400*

6401 1943IT Switzerland 1940D 758748 75886

6402 Observations made in Switzerland and reduced to 1940.0/

6410-

6411 1966 Ireland 1965DIHXYZF9 758867 75892

6412 Observations from a survey of Ireland/

6420*

6421 1966JA Japan 19621965DIH 758923 75899

6422 Geographical Survey Institute, Vol 12, Part l*Observations made during a

6423 magnetic survey of Japan/

6430-

6431 1966JA Japan 19611964D H F2 759089 75994

6432 Aeromagnetic survey of Japan/

6440

6441 Mozambique, Angola 19641965D H Z 759942 76006

6442 Manuscript copy*Magnetic survey observations in Angola and Mozambique/

6450

6451 SF Antarctica 1965 9 760070 76008

6452 Field observations, includes repeat stations and some new stations made

6453 at intermediate points on this traverse by South Africa/

6460

6461 1959 Congo 19521956 Z 760087 76049

6462 Catalogue des stations gravimetrique et magnetiques Definition et resulta

6463 des mesures, Series 8 Vol 26/

6470

6471 EG UAR (Egypt, Syria) 19631966DIH ZF 544400 54464

6472 Magnetic survey of UAR - Manuscript copy/

6480*

6481 1968FR Gabon 1966D H Z 544670 54469

6482 Reseau general de bases magnetiques, ORSTOM/

6490*

6491 1965JA Japan 19581963DIH 760500 76098

6492 Observations from second and third order survey of Japan*Bulletin of

6493 Geographical Survey Institute Vol 8, Part I 1962*Bulletin...Vol II,

6494 Part 1-2 1965*Actual years - 1958, 1960, 1963/

6500*

6501 1966FR France 1965D H F 760990 76101

6502 Lee stations de la France metropolitaine pour le Leve Magnetique Mondial*

6503 Note IPG No. 18/

6510

6511 BR Brazil 19561960D 761020 76133

6512 Observations in the Amazon Basin/

6520*

6521 196420 Equatorial Guinea 1960D H Z 761335 7614C

6522 Levantamento geomagnetico do territorio da Guine*Jan to Apt 1960/

6530

6531 Spitzbergen, Japan, Antarctica 19581967DIH 544700 54471

6532 Magnetic observations made by Polish expedition during IG¥*Spitzbergen,

6533 Okinawa, Spitzerbergen again, Antarctica*Portuguese observations in Macau

6O
6534 China*South African observations in Antarctica on a 1966 traverse*

6535 0kinawa Registry Card/

6540*

6541 1967NZ New Zealand 1960DIHXYZF 761405 76164

6542 The geomagnetic field in New Zealand at epoch 1960.5/

6550*

6551 19685F South Africa, Rhodesia 19631966D H ZF9 761645 76174

6552 Data forwarded by van Wijk of Hermanus Observatory in South Africa/

6560

6561 US Indian Ocean 1964 F6 761749 76335

6562 Observations of total intensity by the "Pioneer" on the IIOE/

6570

6571 UK Scotia Sea 19601965 F6 763360 76572

6572 Observations of total intensity made by British ship "Shackleton"/

6580

6581 US Pacific 1965 F6 765727 76710

6582 Observations made by the "Pioneer" in the Pacific as part of Upper Mantle

6583 Project/

6590*

6591 1968FI Finland 194519671) H Z 9 767105 76758

6592 Measurements at geomagnetic secular stations in Finland*C Sucksdorff/

6600

6601 US Antarctica 19671968 767589 76759

6602 The South Pole-Queen Maud Land Traverse Ill*Norman Peddle/

6610

6611 CA Canada 1967])1 F 767599 76761

6612 Repeat observations of 1967 field survey/

6620

6621 BR Trindade Island, Brazil 19641967DIH 767619 76768

6622 Observations made on Trindade Island in 1964*0bservations made in Brazil

6623 during 1964-1967/

6630

6631 1968M0 Morocco 19671) H F 767689 7677C

6632 Le nouveau reseau magnetique du Maroc, March 1968-1967.5

6633 (March-July 1967)/

6640

6641 SW Sweden 19531967D H Z 767706 76787

6642 Contribution to the WMS. A published report is in preparation*F Elemam/

6650

6651 P0 Cape Verde Islands 19611964D H Z 767880 76807

6652 Observations made by Portugal in its overseas provinces/

6660

6661 URAntarctica 19601962D H Z 768078 76834

6662 Magnetic observations made on the Sixth Soviet Expedition to the

6663 Antarctic/

6670

6671 UR Atlantic. & Indian Oceans 196419671) H ZF4 768349 76964

6672 Magnetic observations by "Zarya" in the Atlantic and Indian Oceans/

6680*

6681 1968FR French West A/rlca 16821956DIH 769545 76960

6682 Mesures maEnetique peu connues effectuees en Afrique Occidental (An atlas

6683 of old observations made in the former French West Africa territory)*

6684 Hans G Barsczus*Ivory Coast, D_homey, Guinea, Upper Volta, Mali, Niger,

6685 Mauritania, Togo, Senegal/

6690-

8891 1967FR Chad, Niger 19621965D H Z 789808 77006

6892 Reseau de bases magnetiques au Niger et au Tchad Occidental*0RSTOM/

6700*

6701 1967FR French West Africa 19591962D H Z 770062 77019

6702 Afrique 0ccidentale, Mesures effectuees de 1959 a 1962.0RSTOM*Mali, Upper

61
6703 Volta, Senegal, Mauritania, Ivory Coast/

6710-

6711 1968AS Australia, Antarctica, Pacific 19641966DIH ZF 770194 77026

6712 Magnetic observations made by Australia on islands in Pacific and Indian

6713 Oceans and on a traverse in Antarctica (1964-1965).BMR Record No. 1968-2-

6714 Regional magnetic surveys in Australia, 1965-1966*BMR Record No. 1969-5/

6720*

6721 1968 Luxemburg 1965D H F 770265 77031

6722 The distribution of the Earth's magnetic field in the Grand Duchy of

6723 Luxemburg at Jan 1 1965/

6730

6731 CA Canada 19681969DIHXYZF 770316 77035

6732 Station observations from Canadian repeat work/

6740*

6741 1968JA Japan 19621965DIH 770360 77039

6742 Magnetic observations made in Japan*Hydrographic Office/

6750

6751 1967R0 Romania 1960DIH Z 770400 77041

6752 Geofisica, Seria 2, Tomul 5/

6760*

6761 1968FR Tanzania 19661967 F 770420 77048

6762 Magnetic measurements on Kilimanjaro*T G Emeleus & D G Osborne*Annales

6763 de Geophysique, Vol 24, pp. 715-717, 1968/

6770

6771 ID Indonesia 1969D H Z 770482 7705C

6772 Manuscript copy*Observatlons made in 1969-Some repeat stations/

6780*

6781 1967FR Cameroon 1966D H Z 770508 77056

6782 Reseau general de bases magnetiques, Republique Federals du Cameroun*Etu4

6783 magnetique de la region du Mont Cameroun (1966)/

6790

6791 UK Worldwide 19631967 770561 77066

6792 A manuscript of observations compiled by the British that are not in

6793 USC&GS files/

6800

6801 1967MX Mexico 1965D 770668

6802 Anales del Instituto de Geoflsica, Vol 12/

6810

6811 IT Karakorum (India) 19541955D H Z 770727 77079

6812 Geophysics of the Kara_orum, Vol l-Magnetic results of the Italian

6813 Expedition to the Karakorum-Hindu Cush area*Karakorum, Hindu Cush (India

6814 Pakistan)/

6820

6821 FR France 1965 F 770796 77094

6822 Observations of total intensity in the Alsace zone/

6830*

6831 1966IT Italy 1963 77132

6832 Bollettino di Geofisica, Vol 8*Magnetic results in Southern Italy/

6840*

6841 I961UR Antarctica, Atlantic 19581967 H Z 4 771321

6842 Observations made By USSR on "Oh" voyages to Antarctlca and by "Akademik

6843 Kurchatov" in the Atlantic*Geomagnetism and Aeronomy/

6850*

6851 Ghana 19631967D H 77152

6852 Magnetic observations made during the IQSY and WMS*Manuscript copy/

6860*

6861 1969 Ireland 19661969D 9 771524 77154

6862 The secular variation of magnetic declination in Ireland/

6870*

6871 1970JA Japan 19491968DIH Z 9 771547

62
6872 GSI Bulletin, Vol XV, Part 2, March 1970/

6880

6881 AS Australia 1967D H Z

6882 Third order field magnetic survey of Queensland, Australia/

6890

6801 US Gulf of Mexico 1065 F6 773100

6892 Observations of F made by Southwest Center for Advanced Studies, Dallas,

8803 Texas/

6900*

6901 1971DA Greenland 19061973D H Z 777500 77787

6002 Ground based geomagnetic measurements in Greenland*J Wilhjelm*An account

6903 of a survey in 1965 and a general summary of observations performed since

6904 1587/

6910

6911 FI Finland 19671970D H Z 777873 77794

6912 Punched cards of observations made on eastern and southern coasts of

8913 Finland/

8920*

6921 1971FR France 1967D H Z 9 777950 77798

6922 Observations magnetiques, Reseau magnetique de repetition de la France/

8930

6931 AS Australia 1969D H Z 777981 77801

8932 Named stations: mean values of DHZ, numbered stations: third order

8933 stations occupied during 1969 first order survey/

8940

6941 ID Indonesia 19701971DI ZF 778900

6942 Manuscript copy*Observations made on islands of Java, Madura and Bali/

8950*

8951 1963BE Belgium 1960D H Z

6952 Les anomalies magnetique de la Belgique/

8980

6961 CA Canada 19621972D H Z 779700 77996

6962 Field and repeat observations from Canada/

6970

6971 JA Japan 19521968D H Z 9 779964 78023

6972 Magnetic repeat station results from Japan/

6980*

6981 1975 Kenya 1970D H Z 780240 78027

6982 Magnetic survey of Kenya during 1971-72*0bservations reduced to 1970/

6990*

6991 SF South Africa, Rhodesia 19691972D H ZF9 780280

6992 Observations of DHZ at repeat & field stations. Includes maps of DHZF

6993 for 1970.0/

7270*

7271 1975AU Austria 1970D H Z 783160 78338

7272 Field observations/

7280

7281 SF South Africa 19741) H Z 794000 79408

7282 Provisional results*Secular variation survey of Botswana and Rhodesia/

7290

7291 Central America 19661974DIH 781500 78154

7292 Results of magnetic measurements in Central America/

7300*

7301 1974FR France 1972DIH ZF0 781700 78173

7302 Results of magnetic measurements at repeat stations in France/

7310-

7311 1974 Pakistan 19601970D H Z 9 780350

7312 Observations at repeat & field stations*Actual years - 1960, 1965, 1970/

7320*

7321 1972FI Finland 19671971D H F 780600

63
7322 Results of magnetic measurements in south and east Finland/

7330*

7331 1973JA Japan 1970D H Z 782000

7332 Aeromagnetic survey of Japan reduced to sea level*H.0. Pubn. No. 592,

7333 No. 2, March 1973/

7340*

7341 1973JA Japan 19681969 9 782600

7342 Land observations made in Japan by the H.0.*H.0. Pubn. No. 592 No. 2

7342 March 1973/

7350

7351 AS Australia 19681969 784040

7352 Regional magnetic survey East Australia, 1968-3rd order, 1968-69-

7353 Papua New Guinea, 1969/

7360

7361 CA Canada 18901975D H Z 9 786155 78618

7362 Results of field and repeat stations/

7370

7371 CA Canada 19651972D H Z 2

7372 85113 records at half-minute sampling rate*Aeromagnetic data on magnetic

7373 tape C4689/

7380

7381 NZ New Zealand 19711976D H ZF9 786190 78619

7382 Repeat stations/

7390

7391 Greenland Sea 2

7392 77450 records at 0.I minute sampling rate*Greenland Sea aeromagnetic

7393 data on magnetic tape C1420/

7410

7411 AS Australia 19671975 800000 80806

7412 All third order Australian observations/

7430*

7431 1977URUSSR 19421972 Z 808081 81099

7432 Catalogue of the geomagnetic field Z-component values of the Mongolian

7433 People's Republic territory*IZMIP_

7440

7441 Maupiti (Society Islands) 1977 811000 81102

7442 Maupiti survey/

7450

7451 BR Brazil 1978DI F9 811021 81104

7452 Brazilian repeat stations/

7460

7461 MO Morocco 1976 9 811046 81105

7462 Moroccan repeat stations/

7470*

7471 1978JA Japan 1975D H Z 9 811058 81107

7472 Japanese repeat stations*1975.S*Data Report of Hydrographic Observations,

7473 No. 3, June 1978 (MSA)/

7480*

7481 1978JA Japan and adjacent seas 19731976 XYZ 2 811073 81197

7482 Japanese aeromagnetic tape*Proton magnetometer F: 5300*Fluxgatm three7483 component: 4600 ,I minute values*Reformat to 1 value every 5 minutes for

7484 meld file/

7490

7491 BR Brazil

7492 Brazilian repeat stations/

3600

3601 US US (Alaska)

3802 Alaskan repeat stations (preliminary)/

7500

7501 BR Brazil

1977 9 817580 81758

1975 9 817584 8176C

1975 9 817808 81781

64
7502 Brazilian repeat stations/

7510

7511 Venezuela

7512 Venezuelan repeat stations/

7520*

19691970 9 817612 81764

7521 1978FR France 1977 9 817646 81767

7522 French repeat stations*1977.5*Observatlons Magnetiques Fasc. 35/

7530

7531 US 721993 72335

7532 US Project Aeromag Nuwivak/ 2

7540

7541 CA Canada 19779 H Z 9 817679 81771

7542 Canadian repeat stations/

8000*

8001 19858P Spain 19621983D H Z 9

8002 Spanish repeat station data from typed list from Direccion General del

8003 Instituto Geografico Nacional, received by DMS Mar 12 1985 and forwarded

8004 by them (DMS Ref Bz5OO.2A)/

8010-

8011 198420 Portugal, Azores 1984]) 1

8012 From typed list from Servico Cartografico do Exercito, dated May 30 1984.

8013 (DMS Ref Bv5OIA)/

8020*

8021 1986CZ Czechoslovakia 1980D H Z 9

8022 From typed list sent by J Podsklan, Hurbanovo Observatory Aug 4 1986/

8030*

8031 1982BE Belgium 1980D I

8032 Values at centres of sheets of 1:25000 map series from list provided by

8033 Institut Geographique National, received by DMS Oct 2 1982. Latitudes

8034 and longitudes added by DMS (DMS Ref Ba502A)/

8040*

8041 1983DA Denmark 1975D H Z 1

8042 The geomagnetic elements in Denmark 1928-80-H A Hansen*Det Danske

8043 Meteorologiske Institut Geofysik Afdeling, pp. 22-57/

8050*

8051 1976 Greece 1976D I

8052 Chart of the Magnetic Declination (D) for Greece for the 1st of January

8053 1976-D values printed on chart, positions interpolated (DMS Ref Bo501A)/

8060*

8061 1985NL Netherlands 1980D XYZ 9

8062 Charts received from J As, Royal Netherlands Meteorological Institute

8063 Sept 1988. Values printed on charts, positions interpolated/

8070*

8071 1982FR France 19801982DI F9

8072 Reseau magnetique de repetition de la France, Campagne 1982-D Gilbert &

8073 J L Le Mouel*IPG Obsns. Magn., Fasc. No. 50/

8080-

8081 1983DA Denmark 19281980D H Z 9

8082 The geomagnetic elements in Denmark 1928-80-H A Hansen*Det Danske

8083 Meteorologiske Institut Geofysik Afdeling, pp. 12-13/

8090*

8091 1981GE Germany 1980D i

8092 From computer listing received via DMS (DMS Ref BmSO2A)/

8100-

8101 1985 Greece 1985D 1

8102 Chart of the Magnetic Declination (D) for Greece for the 1st of January

8103 1985-D values printed on chart, positions interpolated (DMS Ref Bo501B)/

8110-

8111 1981N0 Norway 1980D 1

8112 Values interpolated at I degree intervals of latitude & longitude from

65
8113 contour chart received via DMS (DMS Ref Bt501C)/

8120-

8121 1981 Turkey 1980D 1

8122 Values interpolated at 1 degree intervals of latitude & longitude from

8123 contour chart received via DMS (DMS Ref Bac501A)/

8130-

8131 19861T Italy 1985D H Z 9

8132 From computer listing provided by Istituto Nazionale di Geofisica

8133 (DMS Ref Bq500c(3))/

8140-

8141 1986FI Baltic Sea 1985D H F4

8142 Observations in the Gulf of Finland made on board "Zarya". Data

8143 received on magnetic tape from C Sucksdorff, Finnish Meteorological

8144 Institute Oct. 1988/

8150-

8151 1986FI Finland 194519869 H Z 9

8152 Repeat station data received on magnetic tape from C Sucksdorff,

8153 Finnish meteorological Institute Oct. 1986*Values reduced to middle

8154 of year using quiet-day annual means/

8160-

8161 1986UK Great Britain 1985D 9

8162 Preliminary values reduced to 1985.0/

8170-

8171 1982DA Faeroe Islands 1980D H Z 9

8172 Geomagnetiske malinger pa Faeroerne*H A Hanson*Dot Danske Meteorologiske

8173 Institut Geofysik Afdeling, p. 9/

8180-

8181 1984 Iceland 1984/) H Fg

8182 Leirvogur Magnetic Results, 1983/

8190-

"'8191 1986 Ireland 19801985D H Z 9

8192 The secular variation of magnetic declination in Ireland (1985)*K G

8193 Commins*And letter from Irish Meteorological Service/

8200*

8201 1986 Switzerland 1978D H Z 1

8202 Data received on magnetic tape from G Fischer, Neuchatel Observatory

8203 Nov. 1986. Slightly modified of data in A New Geomagnetic Survey of

8204 Switzerland*G Fischer, P A Schnegg _ J Sesiano*Materiaux Geolog. Suisse,

8205 Geophys., No. 19 (1979), pp. 37-42/

8210-

8211 1986BR Brazil 1985DI F9

8213 Campo geomagnetico normal e sua variacao secular no Brasil em 1985,0.

8214 C de Mello Motta & L M Barreto/

8220*

8221 1985 China 1980DIH 9

8222 Repeat station data received from Shi Mei-kung, Institute of Geophysics

8223 Academia Sinica, May 1985/

8230*

8231 1984R0 Romania 1980 H Z 9

8232 Valori normale ale elementelor geomagnetice H, Z si F in Romania, la

8233 epoca 1980,0-C Demetrescu & T Nestianu*St. Cerc. Geol., Geofiz., Geogr.,

8234 Geofizica, 22, 35-41/

8250*

8251 1983UK Saudi Arabia 19801983D H F1

8252 Observations by various surveying companies, provided by Clyde Surveys

8253 Reduced to epoch by BGS/

8260*

8261 1985UK Worldwide 19821985D H F1

8262 Observations made by Hydrographic Department, MOD/

8270*

66
8271 19828F South Africa, Botswana 19771980D H Z 9

8272 Geomagnetic secular variation observations in southern Africa 1980-

8273 G J Kuhn*CSIR Rep. MAG C7, pp.6-12/

8280*

8281 1983JA Japan 1980D H Z 9

8282 Magnetic survey of Japan IgTg-lg80*Data Rep. Hydrogr. 0bsns. Series

8283 Magn. Surv. No. 4, pp. 15-17/

8290*

8291 1987UK'Canada 1982D H Z 9

8292 Observations of the magnetic field at International Polar Year sites

8293 in Canada*L R Newitt*Nature/

8300*

8301 1986CA Canada 1984 XYZ 9

8302 Relocation of the north magnetic dlp pole*L R Newitt & E R Niblett*

8303 Can. J. Earth Sci., 23, 1062-1067, Table I/

8310-

8311 1985SF South Africa, Botswana 19821984D H Z 9

8312 Geomagnetic secular variation observations in southern Africa 1985-

8313 G J Kuhn*CSIR Rep. MAG C8, pp. 7-15/

8320*

8321 1987UKAntarctic 19851986D H F9

8322 Hallpike, T. R., }{MS "Enduramcet'. Report of magnetic observations in

8323 South Georgia, South Shetlands, Antarctic Peninsula and Falkland Islands

8324 December 1985 - February 1986 (HI 275).

8330*

8331 1987ITK South Atlantic 19881987I) H F9

8332 Kelly, P. J. L., South Atlantic. Magnetic observations ashore.

8333 H. M. Surveying Ship "Herald". Surveyed by Commander F. J. L. Kelly,

8334 Royal Navy, Is, November 1986 - 14th February 1987. Report of Survey

8335 (HI 350).

8340*

8341 1987UK South Georgia 19841987D H Z 9

8342 Buckingham, J. P., Dowson, M. J. & Simmons, D. A., Notes on geomagnetic

8343 repeat measurements at Grytviken, April 1987. Bull. Brit. Amtarct. Surv.

8350*

8351 1987UK Ascension Island 19871) 9

8352 Kimber, S. M., Ascension Island. H. M. Surveying Ship "Herald". llth -

8353 15th July 1987. Report of Survey. Hydrographic Dept. Ref. 266/11.

8380*

8361 1987JA West Africa 19731986D H Z 9

8362 Vassel, J., Secular change in the geomagnetic field in West Africa

8363 for thirty years: comparison with fourth generation IGRF models. J.

8364 Geomagn. Geoelectr., 39, 699-707/

8370*

8371 1988JA Japan 1985D H Z 9

8372 Magnetic survey of Japan 1984-1985*Data Rep. Hydrogr. Obsns. Series

8373 Magn. Surv., no 5, pp. 21-22/

8380*

8381 1988FR France 19881987DI F9

8382 Gilbert, J., Reseau magnetique de repetition de la France*Unpublished

8383 document from Institut de Physique du Globe de Paris/

8390*

8391 1988FR French Subantacrtic Islands 19811988DI XY F9

8392 Bitterly, J., Maisons, C., Bitterly, M., Folques, J. & Schlich, R.

8393 Absolute magnetic measurements at French Subantarctic island: repeat

8394 stations results for the period 1981-1987*Inst. Phys. Globe, Strasbourg/

8400*

8401 1988JA Japan 19791986DIH F9

8402 Geomagnetic observations at Mizusawa and Kanozan 1987, first order

8403 geomagnetic stations 1979-1986, Geographical Survey Institute, Japan/

67
8410-

84111g8gCA Canada 19871988DIH ZFg

8412 Canadian repeat station data received from Larry Newitt on IBM diskette/

8420-

8421 lgSgJA Japan 19841985 XYZ 2

8422 Aeromagnetic observations received from Martime Safety Agency

8423 on magnetic tape. Values reduced to 1985.0 have been publishedin

8424 Magnetic survey of Japan 1984-1985*Data Rep. Hydrogr. Obsns. Series

8425 Magn. Surv., No. 5 (see source 837)/

8430*

84311gSgNZ New Zealand 19751988 XYZ g

8432 Values at 3 New Zealand repeat stations received in letter from DSIR

8433 dated 1989 May 12.

8440*

8441 1989P0 Portugal Ig88DI F9

8442 Values at 19 Portuguese repeat stations, reduced to epoch 1988.0

8443 Received in letter from Instituto Nacional de Meteorologia e Geofisica

8444 dated May 2gth lg89

8450*

8451 lg87DA Denmark 1985D H Z g

8452 Values at g repeat stations expressed as differences from Rude Skov*

8453 Brorfelde Geomagnetic Observatory, Magnetic Results, 1985, Danish

8454 Meteorological Institute, Copenhagen, 1987.

g000*

g001 lg86UR USSR lg451g60D H Z g

go02 Values at Russian repeat stations interpolated graphically to epochs

9003 Ig45, 1950, 1955 & I960*Received from V P Golovkov via WDDC B/

85480*

85481 lg48GE Worldwide lgOODIH Z 0 790000 141

85482 Katalog der Jahresmittel der magnetischen Elemente der Observatorien und

85483 der Stationen*In separate file/

68
XI. FORMATS

Most of the data sets to be described are in one of a series of "standard"

formats, or a minor variation therof. This section describes the standard

formats (see Table of Contents for a listing of formats).

A. The NOAA Survey Format

The NGDC of NOAA has adopted a standard format for their world-wide

magnetic survey data. The format has 130 characters per record and has i0

records per block. The format description is as follows:

ITEM NAME LOCATION FORMAT

i AI

A NM 2 - 16 AI5

B T 17 - 22 F6.2

23 - 24 A2

C CLT 25 - 31 F7.3

D ELN 32 - 39 F8.3

E EL(l) 40 - 49 FI0.3

F EL(2) 50 - 57 F8.3

G EL(3) 58 - 64 F7.0

H EL(4) 65 - 72 FS.0

I EL(5) 73 - 80 FS.0

J EL(6) 81 - 88 F8.0

K EL(7) 89 - 95 F7.0

L ALT 96 -i00 I5

M CDE i01 -102 12

DESCRIPTION

Blank

Station Name (Track)

Time (Year and Fraction since 1900)

Blank

Geodetic Colatitude (Deg.)

East Longitude (Deg.)

Declination, D (Deg.)

Inclination, I (Deg.)

Horizontal Intensity, H (nT)

North Component, X (nT)

East Component, Y (nT)

Vertical Intensity, Z (nT)

Total Intensity, B or F or T (nT)

Altitude (tens of meters, except for

Satellite data which is km.)

Data Code

For data from BGS and for our internal use, item M has been subdivided into

two items. The first is new; the second is identical to the NOAA Data

Code.

CDE i01 AI

IDC 102 Ii

N NSO 103 -106

O NSL 107 -114

P IOC 115 - 121

'*' if corrections have been made

to this record.

'A' if all data on this record are

anomalous

blank otherwise

Data Type Code

=I, Land Survey Data

=2

=3

=4

=5

=6

=9

=0

Aeromagnetic Data

unused

3-component Marine Data

Satellit_ data

HaL ine total intensity data

Repeat Station data

Observatory Annual Means

14 Source Number

18 Serial Number

711 Element Code: observed element code

=0: no value for this element

=i: this element has been calculated

69
Q IH 122 -125 12

IM 12

R CY 126 -130 A5

=2: observed value

The following codes have been added

=3: computedvalue rejected during

=4: observed value rejected during

=5: computed value rejected during

=6: observed value computed value

=7: gross outlier

=8: not used

=9: anomalous observed value (BGS)

GMT:UT time in hours

: UT time in minutes

Country code: Abbreviated country or

For example, this record can be read with the statements:

WRITE( ) NM, T, CLT, ELN, EL, ALT, CDE, IDC, NSO,NSL, IOC, IH, IM, CY

FOR_T (AI6, F6.3, F9.3, F8.3, FI0.3, F8.3, F7.0, 3F8.0, F7.0, F5.0,

AI, Ii, 14, 18, 711, 212, AS)

B. NewFIT Format

TILeoutput from the programs which filters aeromagnetic and shipborne data

along track, i.e. AVSIGand the statistical binning routine i.e. EQBIN

described above, is the standard data base library format as of 3/91.

A header record prefaces the data for surveys only. The format for each

data record is as follows:

(A4,1x,AIS,II,II,IX,14,18,1X,F8.3,16,18,1X,2F7.3,2(F8.3,1X),2F8.3,SF8.1,

IX,7(2II),IX,2F6.3,5F5.1,1X,I4,1X,3FI0.5,21x)

Where :

Item Location Data type Format

A i - 5 Char*4 A4,1x

B 6 - 20 Char*15 AI5

C 21 Integer Ii

D 22 - 23 Integer ll,lx

E 24 - 27 Integer 14

F 28 - 36 Integer 18,1x

Description

Four-letter code

Station Name

Data Source code:

0-Observatory

i- Land

2- Aeromagnetic

4- 3-component marine

5- Satellite

6- Scalar marine

9- Repeat station

Reference frame code:

i - Geodetic

2 Geocentric

3 Satellite

coordinates

Source #

Serial #

70
G

H

I

J

K

L

M

N

0

P

Q

R

S

T

U

V

W

X

Y

Z

AA

BB

CC

DD

EE

FF

GG

37 - 44

45 - 50

51 - 59

60 - 66

67 - 73

74 - 82

83 - 91

92 - 99

i00 - 107

108 - 115

116 - 123

124 - 131

132 - 139

140 - 148

149 - 163

164 - 169

170 - 175

176 - 180

181 - 185

186 - 190

191 - 195

196 - 201

202 - 205

206 - 215

216 - 225

226 - 235

235 - 255

Real

Integer

Integer

Real

Real

Real

Real

Real

Real

Real

Real

Real

Real

Real

Integer

Real

Real

Real

Real

Real

Real

Real

Integer

Real

Real

Real

F8.3

16

18,1x

F7 3

F7 3

F8 3,1x

F8 3,1x

F8 3

F8 3

F8 1

F8 1

F8 1

F8 1

F8 l,lx

Time (decimal years)

Modified Julian Date

Milliseconds of day.

Geodetic colatitude (DEG)

Geocentric colatitude (DEG)

East longitude (DEG).

Altitude (Km)

Declination I (DEG, DEG/YR)

Inclination I (DEG, DEG/YR)

Horiz. component I (nT,nT/yr)

North component I (nT,nT/yr)

East component I (nT,nT/yr)

Vertical component I (nT,nT/yr)

Total Intensity I (nT,nT/yr)

7(211),iX Data type codes

(for items N - T):

First digit

0 No data

i Computed

2 Observed

3 Computed derivative

4 Observed derivative

9 Anomalous

Second digit:

0 Data acceptable

I Gross outlier

2 Padded time gap value

3 B-spline outlier.

4 - Fourier function outlier

5 - B-spline/Fourier

combination outlier.

6 - Geocentric latitude

bound exceeded.

7 - Satellite direction

indeterminable.

F6 3

F6 3

F5 1

F5

F5

F5

F5

i

I

i

I.IX

Dec. sigma (Deg,Deg/yr)

Incl. sigma (Deg,Deg/yr)

H. component sigma(nt,nt/yr)

N. component sigma(nt,nt/yr)

E. component sigma(nt,nt/yr)

V. component sigma(nt,nt/yr)

T. intensity sigma(nt,nt/yr)

14

FI0.5

FI0.5

FI0.5

21X

DST value

Transformation angle #I.

.... 12.

.... #3.

Spare.

71
I( If the data type code for this value equals 4, units are replaced by a

rate in units per year)

C. Survey Format for (old) FIT Program

The output of the old EQBIN program is listed here for historical purposes.

A record in this format is written as follows:

WRITE ( ) NM, T, CLT, ELN, IALT, NEL, EL, SMEAN, SSTMOD, SSKEW, SKURT

BMEAN, BSTMOD, BSKEW, BKURT

FORMAT (IX, AI6, F6.3, F7.3, F8.3, 15, Ii, 9FI0.3)

where:

NM

T

CLT

ELN

IALT

NEL

EL

SMEAN

SSTMOD

SSKEW

SKURT

BMEAN

BSTMOD

BSKEW

BKURT

Station Name

Date (Year - 1900.0), units years

Colatitude (Deg.)

East Longitude (Deg.)

Altitude: lO's of meters for survey: km for satellite

Component Code

=i: Declination, D (Deg.)

=2: Inclination, I (Deg.)

=3: Horizontal Intensity, H (nT)

=4: North Component, X (nT)

=5: East Component, Y (nT)

=6: Vertical Component, Z (nT)

=7: Total Intensity, F, B or T (nT)

Actual component measurement corresponding to NEL

Survey source mean

Survey source modified standard deviation

Survey source skewness

Survey source kurtosis

Equal area bin mean

Equal area bin modified standard deviation

Equal area bin skewness

Equal area bin kurtosis

D. Binary (old) FIT Format.

One of the common formats into the (old) field modeling program is listed

here. Data from the POGO, Magsat and DMSP F-7 satellites are generally in

this format, or a variation therof. These file_ arw binary with i00 points

per record and with each point having 28 REALe4 words of data, as follows:

REAL*4 A(28,100)

INTEGER IA(28,100)

EQUIVALENCE (A(I,I), IA(I,I))

ARRAY LOCATION DESCRIPTION

72
IA(I,I)

IA(2,1)

A(3 I)

A(4 I)

A(5 I)

A(6 I)

A(7 I)

A(8 I)

A(9 I)

A(IO,I)

Modified Julian Day.

Milliseconds of Day.

Not used.

In some cases not used, in others fraction of day.

Time in years from 1900.

Geocentric latitude.

Longitude.

Not used.

Not used.

Not used.

If data are in geocentric coordinates:

A(II,I) North component, -B#, or Satellite X-axis

A(12,I) East component, B_, or Satellite Y-axis component.

A(13,I) Satellite Z-axis component (along-track).

If data are in spacecraft coordinates:

A(II,I) Cross track component

A(12,I) Radially down component

A(13,I) Along track component

A(14,I)

IA(15,I)

A(16,1)

A(17,I)

IA(18,1)

IAI9 I)

IA,20 I)

IAq21 I)

IA,22 I)

IAq23 I)

IA124 I)

IA125 I)

A(26,1)

A(27,1)

A(28,1)

Scalar total intensity.

Geocentric altitude (meters) above earth radius,

Not used.

Not used.

Used only for DMSP = Data quality classification

0 = Data is adequate quality

1 = Residual from field model exceeds a

2 = Padded time gap value (data does not

3 = Outlier from B-spline function

4 = Outlier from Fourier function

5

6 = Latitude of data exceeds specified

7 = Direction of satellite indeterminable

=0

=0 except for DMSP where it indicates satellite

=0

Magnetic latitude outlier flag for sat. X axis.

,I

Not used.

Not used.

Not used.

ii 11 . . . y ,,

II II II Tt It Z t!

........ total intensity.

The above format was used for the early Magsat data. However, as the Magsat

data selection became ,lore sophisticated, format variations became

necessary. These fall into several classes:

"Select" Format: same as the "standard" format, except:

A(4,1)

ii - 14

A(28,1)

Fraction of day

X, Y, Z, and F (Geocentric so: -B@, B#, -B r)

Dst

73
"Correction" Format: same as the "standard" format, except:

A(4,1)

A(8,1)

A(9,I)

A(10 I)

A(II I)

A(12 I)

A(13 I)

A(14 I)

A(16 I)

A(17 I)

A(18 I)

A(19,1)

IA((20,I)

IA(21 I)

IA(22 I)

IA(23 I)

IA(24 I)

IA(25 I)

IA(26 I)

IA(27 I)

A(28,I)

Fraction of day

Computed X (=-B@), from GSFC(9/80)

Computed Y (=B#), from GSFC(9/80)

Computed Z (=Br), from GSFC(9/80)

Corrected X

Corrected Y

Corrected Z

Corrected F

Uncorrected X

Uncorrected Y

Uncorrected Z

Uncorrected F

Flag for uncorrected X

Flag for uncorrected Y

Flag for corrected X

Flag for corrected Y

Flag for corrected Z

Flag for corrected F

Flag for uncorrected Z

Flag for uncorrected F

Dst

"Gridded" Format

A(3,I)

A(4,1)

A(16,1)

A(17,I)

A(18,1)

A(19,I)

IA(20,I)

A(21,I)

A(26,I)

A(27,I)

A(28,1)

Weight (Used in selecting gridding criteria.)

Dipole latitude

Residual of X

Residual of Y

Residual of Z

Residual of B

Number of data points for type X, Y, Z or B in 5 °

x 5 ° bin.

of residuals about the mean for type X, Y, Z,

5 ° x 5 ° bin.

Average of residuals for type X, Y, Z or B in 5 °

x 5 ° bin.

Sparse data sigma

Dst.

"Pseudo-Fit" Format: same as standard format (I point per record, 28 real*4

words per point) except:

IA(16) geographic equal-area bin number

IA(17) Dst hourly index

E. Project MAGNET 1976-77

Characters Code

1-2 A2

Description

Line Number

74
3-4 I2

5-7 F3.1

8 A1

9-11 I3

12-14 F3.i

15 A1

16-21 I6

22-27 16

28-32 15

33-37 15

38-40 A3

41-44 14

Degrees of Latitude

Minutes of Latitude, implicit decimal point

Sign of Latitude - N/S

Degrees of Longitude

Minutes of Longitude, implicit decimal point.

Sign of Longitude E/W

Date - month, day, year

Time (GMT)- hours, minutes, seconds

Total Magnetic Intensity - in nT.

Altitude - above ground in meters.

Navigation device ESGfor electrostatic gyro.

- INS for mechanical gyro.

Elevation of local terrain in meters

F. Project MAGNETData Format 1981-1989

- Header record

The first logical record of each file is a header consisting of 108

characters. The format is as follows:

Item Location Format Description

A 1-15 Project identification

16 Blank

B 17-27 Flight number

28 Blank

C 29-35 Inclusive Julian days

36 Blank

D 37-40 Year of survey

all others Not used

- Track identification record

A 4-digit integer in columns 1-4 denoting the survey track

id is found only on 1989 data. The remaining columns are unused.

- Data records

Each other logical record includes the following

information in this format: (3FI0.4,5FS.0,2FI0.4,2Fg.0)

Item Location Format

A i-i0 FI0.4

B 11-20 FI0.4

C 21-30 FI0.4

D 31-38 F8.0

E 39-46 F8.0

F 47-54 F8.0

G 55-62 F8.0

H 63-70 F8.0

I 71-80 FI0.4

J 81-90 FI0.4

K 91-99 F9.0

Description

Greenwich mean time in seconds from

midnight of the survey date

Latitude in degrees d_cimal

Longitude in degrees decimal

X-component in nT, observed

Y-component in nT, observed

H-component in nT, computed

Z-component in nT, observed

F total insensity in nT, computed

D computed declination in degrees

I computed inclination in degrees

F total intensity in nT, observed

75
L 100-108 Fg.0 Barometric altitude in feet

G. Canadian Aeromagnetic Survey 1965-1976 (1/2 minute)

Each logical record contains the following format information

for the 1/2' data: (212,14,212,14,F4.0,2FS.3,F7.1,3F7.0)

Item Location Format Description

A 1-2 12 Flight line

B 3-4 12 Hour

C 5-8 I4 Minute to i/i00 place

D 9-10 I2 Day of Month

E 11-12 I2 Month

F 13-16 14 Year

G 17-20 F4.0 Altitude (X i00 ft)

H 21-28 F8.3 Latitude

I 29-36 F8.3 Longitude

J 37-43 F7.1 Declination

K 44-50 F7.0 Horizontal component

L 51-57 F7.0 Z component

M 58-64 F7.0 F component

H. Canadian Aeromagnetic Survey 1965-1972 (Z component).

Each logical record contains the following information for Z

component data (SU2206): (14,312,14,F6.I,F8.3,Fg.3,4F8.I,F7.1,4X)

Item Location

A 1-4

B 5-6

C 7-8

D 9-10

E 11-14

F 15-20

G 21-28

H 29-37

I 38-45

J 46-53

K 54-61

L 62-69

M 70-76

N 77-80

Format

14

I2

I2

I2

I4

F6 1

F8 3

F9 3

F8 1

F8 1

F8 1

F8 1

F7 1

4X

Description

Year

Month

Day

Hour

Minute (eg. 12.00)

Altitude (x i00 ft)

Latitude

Longitude

F

Z

?

?

H

I. USGS Farnella (Puerto Rico)

Each logical record contains the following foumat

inforlnation: (AI4,312olX,2IZ,F8.4,F9.5,23X,215)

Item Location Format Description

A 1-14 AI4 Header record

B 15-16 I2 Year (1900-year)

C 17-18 I2 Month

D 19-21 I2,1X Day

E 22-23 12 Hour

76
F 24-25 12 Minute

G 26-33 F8°4 Latitude

H 34-42 F9.5 Longitude

I 43-65 23X blank

J 66-70 15 Observed total intensity

K 71-75 15 Residual (observed-main field)

L 76-80 5X blank

J. C.G.S. Caribbean Survey 1984, 1986; Artic 1983-87, Canada 1980-85

Data records

Each logical record contains the following format information:

(214,2A4,4X,12,1X,12,1X,12,10(3FS.0))

Item Location Format

A 1-4 14

B 5-8 14

C 9-12 A4

D 13-16 A4

17-20

E 21-22 12

23

F 24-25 12

26

G 27-28 12

H 29-36 FS.0

I 37-44 F8.0

J 45-52 F8.0

53-528 9(3F8.0)

Description

Year

Day of year

Flight indentifier

Line number

blank

Hour of day

blank

Minute of hour

blank

Second of Minute

Geodetic latitude

Geodetic longitude

Scalar magnetic field value

Repeat H,I,J (I0 seconds of

data are given per record)

K. Japanese Aeromagnetic Data 1980

The Japanese aeromagnetic data is in the following format:

(15,513,14,F6.1,15,F6.1,316,2F6.1,316,3X)

Item Location Format

A 1-5 15

B 6-8 13

C 9-11 13

D 12-14 13

E 15-17 13

F 18-20 13

G 21-24 14

H 25-30 F6.1

I 31-35 14

J 36-41 F6.1

K 42-47 16

L 48-53 16

M 54-59 16

N 60-65 F6.1

O 66-71 F6.1

P 72-77 16

Q 78-83 16

Description

Year

Month

Day

Hour

Minute

Second

Latitude (degrees)

Latitude (minutes_

Longitude (deg_eesll

Longitude (minutes)

Altitude meters)

Total Field (xl0 nT)

Horizonal Component(xlO nT)

Declination (degrees)

Inclination (degrees)

North Component(xl0 nT)

East Component(xlO nT)

77
R 84-89 16

S 89-92 3x

Vertical Component(xl0 nT)

blank

L. NOAAMarine Survey Data Format

The following is a description of the format of the raw marine data stored

at NGDC.

On-tape data format:

i. Header file: 16 records, 120 characters per record. Contains

descriptions of data (see NOAAmanual for discussion of data

descriptions)

2. Data file: Data is input with the following FORTRANstatement:

READ(10,100,END=I000)SIGNI,TZONE,IYR,IMO,IDAY,IHR,XMIN,SIGN2,

XLAT,SIGN3,XLON,MAGI,MAG2,SIGN4,RESMAG,

ISENS,SIGN5,DI,SIGN6,ALT

i00 FOP_T(9X,AI,F4.2,412,FS.3,AI,F7.5,AI.F8.5,16X,2F6.I,AI,F5.1,

II,AI,F4.I,AI,F5.0)

Variable description:

Name Type Description

SIGNI C*I + or - sign for TZONE.

TZONE REAL Time zone correction. Equals zero when time

is GMT.

IYR INT Year from 1900.

IMO INT Month.

IDAY INT Day of month.

IHR INT Hour of day.

XMIN REAL Minute. Precision to 0.001 minute.

SIGN2 C*I + or - sign for XLAT.

XLAT REAL Geodetic latitude.

SIGN3 C*I + or - sign for XLON.

XLON REAL Longitude.

MAGI REAL Scalar magnetic field, ist sensor, to 0.i nT.

If unspecified, set to 999999

MAG2 REAL Scalar magnetic field, 2nd sensor. If only

one sensor is deployed or if field is

unspecified, set equal to 999999

SIGN4 C*I + or - sign for RESMAG.

RES_G REAL Residual magnetic field. Set to 99999 if

unspecified.

ISENS INT Sensor used for residual field.

SIGN5 C*I + or - sign for DI.

DI REAL Magnetics diurnal c_rr_ctiono If =9999,

then total and residual fields are uncorrected. If not equal 9999, then total and

residuals are assumed to have been already

corrected.

SIGN6 C*I + or - sign for altitude of sensor. If +,

below sea level, if -, above sea level.

ALT REAL Altitude of lead magnetic sensor above

or below sea level, in meters.

M. Processed Marine Data Formats

78
The processed marine data can be read off tape or disk using program

XRIRB.MARINE.PROGRAMS(RWl). This program reads a particular file or year of

data and separates the file into the 4 data sets mentioned above in the

following order:

i. Output Data Set

- Header record

The first logical record contains a header consisting of 120 characters

and is the title of the file.

- Data record

Each logical record contains the following information in this format:

(AI20)

2. Averaged Output Data

- Header record

The first logical record contains a header consisting of 75 characters

and is the title of the file.

- Data record

Each logical record contains the following information in this format:

(AI0,F9.6,F7.3,F8.3,FI0.I,F7.0,I5,I2,III,F6.1)

Item Location Format Description

A I-i0 AI0 MGGID #

B 11-19 F9.6 Date

C 20-26 F7.3 Latitude

D 27-34 F8.3 Longitude

E 35-44 FI0.1 Standard error of the mean

F 45-51 F7.0 Mean total intensity

G 52-56 15 Altitude

H 57-58 12 Data source code

I 59-69 Ill Data type code

J 70-75 F6.1 Dst

This file is converted to the 'new' FIT format using program

XRIRB._RINE.PROGRAMS(NEWFIT).

3. Average Plot Data

- Header record

The first logical record of each file is a header record

c:onsisting of 38 characters and is the title of the file.

- Data record

79
Each logical record of the file contains the following

information:

Record Location

1 1-38

2 i-i0

2 11-20

3

3

N i-i0

Format Description

A38 Title - MGGID # & Cruise ID

FIO.3 Distance along shiptrack (Km)

FI0.3 Residual scalar anomaly (nT)

"plot information continued

as in the 2nd record"

FI0.3 0.0 marks the end of the

shiptrack

Program XRIRB.MARINE.PROGRAMS(AVETIT2) must be run with this

data set in order to add titles to shiptracks which were

segmented.

4. Non-averaged Plot Data

Header record

The first logical record of each file is a header record

consisting of 38 characters and is the title of the file.

Data record

Each logical record of the file contains the following

information:

Record Location Format

i 1-38 A38

2 i-i0 FI0.3

2 11-20 FI0.3

3

3

N i-i0 FI0.3

Description

Title - MGGID # & Cruise ID

Distance along shiptrack (Fan)

Residual scalar anomaly (nT)

"plot information continued

as in 2nd record"

0.0 marks the end of the

shiptrack

Program XRIRB.MARINE.PROGRAMS(AVETIT2) must be run with this

data set in order to add titles to shiptracks which were

segmented.

N. World Data Center Format

The data are stored on tape with no header record. Stations are listed

alphabetically, and data within each station are _orted _hronologically from

oldest to the most recent year. Data are in fi×ed blo_:ks, 130 characters

per block. Each record is read using a FORTRANread statement with the

format:

(19AI,IX,A3,1X,3F8.3,16,2F8.3,316,17,16,1X,AI,13,15,14,4AI,IX,A3,1X,16)

A _:omplete description is as follows:

Item Location Format Description

80
A i - 19 19AI

20 IX

B 21 - 23 A3

24 IX

C 25 - 32 F8.3

D 33 - 40 F8.3

E 41 - 48 F8.3

F 49 - 54 16

G 55 - 62 F8.3

H 63 - 70 F8.3

I 71 - 76 I6

J 77 - 82 16

K 83 - 88 16

L 89 - 95 I7

M 96 -i01 I6

102 IX

N 103 A1

0 104-106 I3

P 107-111 I5

Q 112-115 14

R 116-119 4AI

120 iX

S 121-123 A3

124 IX

T 125-130 16

Station name (IAGA standard)

Blank

3 - letter code

Blank

Date

Geodetic Latitude

East Longitude

Elevation - meters

Declination - degrees.

Inclination - degrees.

Horizontal intensity - nT

North component (X) - nT

East component (Y) nT

Vertical component (Z) nT

Total Intensity - nT

Blank

Record flag: A = all day, J = JUMP

Foot note - retates to NOTE file.

Data source - relates to SOURCE file.

Source code - 548 for annual means

Element code for elements measured

(e.g. DHZ)

Blank

2 - letter country code.

Blank

Record number - sequence number within

file.

O. Old FIT Format (NOAA format)

Data Organization - The data are stored on tape with no header record.

Stations are listed alphabetically, and data within each station are sorted

chronologically from oldest to the most recent year.

The data are in standard NOAA format. This is fixed block, 130 characters

per record, 30 records per block. Each record is read using a FORTRAN read

statement with the format:

(Ix,AI5,F6.3,2x,F7.3,F8.3,FI0.3,F8.3,F7.0,3F8.0,F7.0,15,12,14,18,711,14/A4*,

A5)

* (A4 is used for observatory and land survey data, 14 for aeromagnetic

and satellite data)

A complete description of NOAA world-wide maKneti' :_urvey data format is as

follows:

Item Location Description

I Blank

A 2 - 16 Station Name

B 17 - 22 Date

23 - 24 Blank

C 25 - 31 Geodetic Colatitude

D 32 - 39 Longitude

81
E 40 - 49

F 50 - 57

G 58 - 64

H 65 - 72

I 73 - 80

J 81 - 88

K 89 - 95

L 96 - I00

M i01 - 102

N 103 - 106

O 107 - 114

P 115 - 121

Q 122 - 125

R 126 - 130

Declination I

Inclination

Horizontal intensity I

North componentI

East componentI

Vertical componentI

Total Intensity I

Geodetic Altitude (Decameters)

Data Flag

Source number

Serial number

Element Code

GMT

Country abbreviation

I ( If the data flag for this type equals 4, data is derivative in units

per year)

P. NOAAWorld-wide Repeat Data

Time period:

description:

1900 - 1985.

World-wide survey and repeat data stations.

Approximately 11,000 data points.

Tape characteristics: Tape density = 1600, ASCII, fixed block,

LRECL=I30,Blksize=3900.

On-tape data format:

Columns Type Format

1 -- IX

2 - 16 C*15 AI5

17 - 24 REAL F8.0

25 - 32 REAL FS.0

33 - 40 REAL F8.0

41 - 48 REAL FS.0

49 56 REAL F8.0

57 63 INT 16,1X

64 -- 70 INT I6,1X

71 77 INT I6,1X

78 83 INT I6

84 89 INT I6

90 95 INT I6

96 100 -- 5X

i01 103 INT I2,1x

104 108 INT I4,1X

109 - 116 INT I7,1X

117 119 C*I 3AI

120 - 127 -- 8X

128 130 C'2 A2,1X

Description

Blank

Station name.

Time (years)

Latitude (deg)

Longitude (deg)

Declination (deg)

Inclination (deg)

H component (nT)

X component (nT)

Y component (nT)

Z component (nT)

B value (total intensity).

Altitude (meters).

Blank

Data identificati_m r_ede (=9)

Source code.

Serial number.

3 Data component codes (DIHXYZ or B

combinations).

Blank.

Country Code.

Q. Kosmos 49

82
The requisite JCL is

II

II

/I

DD UNIT=9TRACK,LABEL=(I,nL,IN),DISP=(OLD,KEEP),

DCB=(RECFM=VBS,LRECL=4004,BLKSIZE=4000,DEN=3),

DSN=M2.XQWMD.K49HORB,VOL=SER=DT0246

And the tape is read by the statements:

DIMENSION FIT(10,100),IFIT(10,100)

EQUIVALENCE (FIT(I,I),IFIT(I,I))

READ( ) IOUT,((FIT(I,J),I=I,10),J=I,IOUT)

Where lOUT: 1"4 = Number of points this profile (record).

FIT ( ,J)

i 1"4

2 R*4

3 R*4

4 R*4

5 1"4

6 1,4

7 R*4

8 R*4

9 R*4

i0 1"4

Milliseconds of day.

Total field value in nT

AF with KOSMOS 8/73 model removed

Altitude, Km

Half-orbit number (i-641)

Instrument number (i or 2)

Geodetic latitude, deg.

East longitude, deg.

=0, spare

Modified Julian Day.

R. POGO

POGO data on tape SU5002 is unformated (binary). Fortran statements to

read the data are:

REAL*4 A(10,100)

INTEGER IA(10,100)

EQUIVALENCE (IA(I,I),A(I,I))

READq ) A

Whe re,

IA(I *)

IA(2 *

A(3 *

A(4 *

A(5 *

IA(6 *

!A(7,*

A(8,*

IA(9,*

A(10,*)

Modified Julian Day (MJD)

Milliseconds of day

Geodetic latitude, deg.

Longitude

Altitude, km.

Satellite flat

Flag value: =i

Total field value, F, nT

Not used

Dst value, nT.

File i POGO-6: =5

File 2 POGO-6: =5

File 3 POGO 2,4,6 =i, 2, 3, resp.

83
S. LORENData Set Format

The data set format is as follows:

FORMAT(IX, 15, 7G18.5)

IP

ALAT

ALON

ALT

X

Y

Z

B

Geocentric latitude (deg.)

Longitude (deg.)

Altitude (above 6371.2 km)

-B@, nT [99999. = pad]

B_, nT

- r, nT

Field magnitude, nT

T. DE-2 Data Formats

i. Original Data

a. Tape characteristics: SU5010 (file i), RECFM=V, LRECL=X, BLKSIZE=I9069.

b. On tape data format: I Logical record equals 21 real*4 words:

Word # Type Description

i INT

2 INT

3 REAL

4 REAL

5 REAL

6 REAL

7 REAL

8 REAL

9 REAL

10-18 REAL

19 REAL

20 REAL

21 REAL

Date (YYDDD)

Time (milliseconds)

X magnetic component, GCI field vector.

y ,, ,, ,, , ,,

Z tl v! . . It

X component, GCI satellite position (km).

Y component, GCI satellite position (km).

Z component, GCI satellite position (km).

Geographic longitude of satellite.

Transformation matrix from spacecraft to

GCI coordinate systems.

X calculated field in GCI coordinates.

Y calculated field in GCI coordinates.

Z calculated field in GCI coordinates.

Sample FORTRAN read: Dimension IA(21), RA(21)

Equivalence ( IA,RA )

Read(10) RA

2. Processed Data

a. Tape characteristics: SU5010 (files 2-4), RECFM=VBS, LRECL=8804,

Blksize=17612, Non-Labeled.

i.. On tape data format: i logical record equals 22 real*4 words:

Sample FORTRAN read:

Dimension RA(22,100),IA(22,100)

84
Equivalence (RA(I,I),IA(I,I) )

Read(10) RA

IDATE= IA(I,I)

ITIME = IA(2,I)

GCI = RA(3,I)

IDST = IA(22,I) etc.

(See discussion of DE-2 for further details.)

DE-2 diskette data are formatted as follows: fixed-block, logical record

length = 60, (IX,F8.3,1X,I6,1X,I8,1X,F7.3,Z(IX,F8.3),IX,FS.I)

where:

Item Location Data type

A 1 - 9 Real

B 10-16 Integer

C 17-25 Integer

D 26-33 Real

E 34-42 Real

F 43-51 Real

G 52-60 Real

Format

IX F8.3

IX 16

IX 18

IX F7.3

IX F8.3

IX F8.3

IX F8.3

Description

Time (decimal years)

Modified Julian Date

Milliseconds od day

Geocentric colatitude

East longitude (deg)

Altitude (km)

Total Intensity (nT)

85
XII. LIBRARYOF DATAFORMAINFIELD ANALYSIS

A. Background

The main field data base was designed to be readily expandable, cover

all data types, allow for duplicate tapes (for back-up), and allow data

_;ets to be fixed at a desired time. The following tables show i) an outline

of the library and its general contents and 2) a detailed listing of tapes

and data sets with a description of formats, contents, and blocking

parameters. The data library is stored on cartridge tapes with VOL=SER

(volume=serial) numbers ranging from SU0000 TO SU9999. On all even numbered

volumes, original, working or final version data are stored, and on all odd

numbered volumes, duplicates of the preceeding cartridge are stored. There

are notebooks describing data processing and formats for these data types

at NASA/Goddard Space Flight Center in Code 921.

Data Type Cartridge # Description

Observatory SU0000 - SU0449

SU0500 - SU0989

SU0990 - SU0999

Land Survey SUI000 - SU1499

SUIS00 - SU1989

SU1990 - SU1999

Aeromagnetic SU2000 - SU2199

SU2200 - SU2299

SU2300 - SU2399

SU2400 - SU2499

SU2500 - SU2599

SU2600 - SU2989

SU2990 - SU2999

S_alar Marine SU3000 - SU3499

SU3500 - SU3989

SU3990 - SU3999

Repeat SU4000 - SU4249

SU4250 - SU4489

SU4490 - SU4499

3-Component SU4500 - SU4749

Marine SU4750 SU4989

SU4990 SU4999

Satellite SU5000 SU5499

SU5500 SU5989

SU5990 SU5999

Miscellaneous SU6000 SU6499

SU6500 SU6989

SU6990 - SU6999

SU7000 SU7989

SU7900 - SU7999

SU8000 - SU8999

Ancillary

Data

Distributed

Data Sets

Ptograms sug000 - SU9099

sugI00 - SU9199

SU9200 - SU9299

SU9300 - SU9399

Original data sets

Final processed data sets

Working data sets

Original data sets

Final processed data sets

Working data sets

Original data - Project Magnet

Original data - Canadian

Original data - European/Scandinavian

Original data - Japanese/Asia

Original data - other

Final processed data sets

Working data sets

Original data sets

Final processsed data sets

Working data sets

Original data sets

Final processed data sets

Working data sets

Original data sets

Final processed data sets

Working data sets

Original data sets

Final processed data sets

Working data sets

Original data sets

Final processed data sets

Working data

Original data

Working data sets.

Original or final versions

Observatory

Land Survey

Aeromagnetic

Scalar Marine

86
SU9400- SU9449 Repeat

SU9450- SU9499 Three ComponentMarine

SU9500- SU9599 Satellite

SU9600- SU9699 Miscellaneous

SU9700- SU9799 Ancillery Data

87
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C. Work in Progress 2/91

This document was assembled to be "fluid" in that it is updated as new data

is processed. Currently, the repeat data with frequent observations at

valid locations requires processing. POGO, POGS, and DE-1 data will be

processed upon data and software availability. Much of the data base

requires cartridge back-ups, and all of the notebooks need to updated. The

decimated Project Magnet data for 1980-1989 currently used should be

£eplaced by undecimated data processed with AVSIG. N00 uncorrected Project

Magnet data for 1989-1990 should be replaced with navigation corrected

data. Observatory biases calculated with past and present models should be

documented and stored in the data library. Additional effort is required

for contacting various data centers (WDC-A, WDC-B, NO0, NRC) for updates to

all data types.

D. Library Maintenance

Inorder for the main field data base to be maintained, the following is

required:

I) For each addition to the data base, appropriate processing documentation

and figures should be added to the notebooks and to the Geodynamic Branch

Main Field Data Base Manual (this text)

2) The unprocessed and processed data should be recorded with the branch

tape librarian and documented in section XII of the Main Field Data Base

Manual.

Current MASS-f1 documentation are held on the LTP/VAX under the GEOBALD

account.

99
XIII. REFERENCES

Baldwin R.T., J.R. Ridgway, and W.M. Davis,' Reduction of marine magnetic

data for modeling the main magnetic field of the earth', Technical Report,

1990.

Bassett, C.H.,' U.S. Naval Oceanographic Office, Geomagnetic Surveys', NO0

Reference Publication RP-23, 1982.

Benkova, N.P. & S.S. Dolginov,' The survey with Cosmos-49', World Magnetic

Survey IAGA Bulletin #28, ed. A.J. Zmuda, 1971.

Cain, J., Shapiro, Stolarik, & Heppner,' Measurements of the Geomagnetic

Field by the Vanguard III Satellite', NASSA TN D-1418, October, 1962.

Haines, G.V.,' Earth Physics Branch aeromagnetic data (1953-1976)',

Proceed. of Aeromag. Data Workshop; Nov. 16-18,1982, Denver, Colo.', 1983.

Haines, G.V. & W. Hannaford,' Magnetic anomaly map of British Columbia and

the adjacent Pacific Ocean', Publication of the Earth Physics Branch, Dept.

of Energy, Mines & Resources, 42, #7, 1972.

Haines, G.V. & W. Hannaford,' A three component aeromagnetic survey of the

Canadian Artic', Publication of the Earth Physics Branch, Dept. of Energy,

Mines & Resources, 44, #8, 1974.

Haines, G.V. & W. Hannaford,' A three component aeromagnetic survey of

Saskatchewan, Alberta, Yukon, and the District of Mackenzie', Dept. of

Energy, Mines & Resources, Geomagnetic Series #8, 1976.

Haines, G.V. & W. Hannaford,' A three component aeromagnetic survey of

Central Canada', Dept. of Energy, Mines & Resources, Geomagnetic Series

#13, 1978.

Haines, G.V. & W. Hannaford,' A three component aeromagnetic survey of

eastern Canada', Dept. of Energy, Mines & Resources, Geomagnetic Series #?,

1980.

Johnston, M.J.S., S.A. Silverman, R.J. Mueller & K.S. Breckenridge,'

Secular Variation, Crustal Contributions, and Tectonic Activity in

California, 1976-1984', J. Geophys. Res., 90, pp. 8707-8717, 1985.

Langel, R.A., R.L. Coles, M.A. Mayhew,'Comparisons of magnetic anomalies of

lithospheric origin measured by satellite and airborne magnetometers over

western Canada', Canad. J. of Ear. Sci., 17, #7, 1980.

Langel, R.A. and R.H. Estes, 'The Near Earth Magnetic Field at 1980

Determined from Magsat Data',J. Geophys. Res., 2495-2510, 1985.

Langel, R.A., J.R. Ridgway, M. Sugiura, K. Maezawa,' The geomagnetic field

at 1982 from DE-2 and other geomagnetic field data', J. Geomag. Geoelectr.,

40, 1103-1127, 1988.

I00
Langel, R.A., D.A. Barraclough, D.J. Kerridge, V.P. Golovkov, T.J. Sabaka,

R.H. Estes,' Definitive IGRFModels for 1945, 1950, 1955, 1960', J. Geomag.

Geoelectr., 40, 645-702, 1988.

Langel, R.A., T.J. Sabaka, J.R. Ridgway,' Processing of DMSPmagnetic data;

Handbookof programs, tapes, and data sets', NASATechnical Memorandum

100757, 1990.

Langel, R.A., R.T. Baldwin, J.R. Ridgway, W.M. Davis,'A compressedmarine

data set for geomagnetic field modeling', J. of Geomag.Geoelectr., v. 42,

9_9-i000, 1990.

Langel, R.A., T.J. Sabaka, R.T. Baldwin,' GeomagneticModel Investigations

for 1980 - 1989: A model for the Strategic Defense Initiative Particle Beam

Experiment and A Study in the Effects of Data Types and Observatory Bias

Solutions ', NASATechnical Memorandum,in press, 1991.

Rich, F.J.,' Fluxgate magnetometer (SSM) for the Defense Meteorological

Satellite Program (DMSP)', Block 5D-2, Flight 7, Air Force Geophysics

Laboratory Report, AFGC-TR-84-0225, IP#326, July, 1984.

Ridgway, J.R.' Reduction of DE-2 satellite magnetic field data for modeling

the main field of the earth, Technical Report, #SAR-NASS-28200-4-88-1,

1988.

Ridgway, J.R., T.J. Sabaka, D. Chinn, R.A. Langel,' Processing of DMSP

magnetic data and its use in geomagnetic field modeling, 1989.

Shure, L., R.L. Parker & R.A. Langel,' A preliminary harmonic spline model

from Magsat data', J. Geophy. Res., 11505-11512, 1985.

i01
Report Documentation Page Nalo_itl Aeror_ullCS

Go,:_:e Adrr_r_s_ralmOn

1. Report No,

NASA TM-104542

2. Government Accession No.

4. TitleandSubtitie

Geodynamics Branch Data Base for Main Magnetic

Field Analysis

7. Author(s)

R.A. Langel and R.T. Baldwin

9. Performing Orgenizatmn Narne and Address

Goddard Space Flight Center

Greenbelt, Maryland 20771

12. Spon_dng Agency Nameand A_ress

National Aeronautics and Space Administration

Washington, D.C. 20546-0001

3. Recipient's Catalog No.

5. Report Date

April 1991

6. Performing Organization Code

921

8. Performing Organization Report No.

91E 01726

10. Work Unit No.

11. Contract or Grant No.

13. Type of Report and Period Covered

Technical Memorandum

14. Sponsoring Agency Code

15. Supplernen_w Notes

R.A. Langel:

R.T. Baldwin:

NASA/GSFC, Greenbelt, Maryland, 20771.

ST Systems Corporation, Lanham, Maryland, 20706.

16. Ab_tmct The purpose of this catalog is to briefly describe the data sets used in

geomagnetic field modeling at GSFC. Data are measured and obtained from a variety

of information and sources. For clarity, data sets from different sources are

categorized and processed separately. The data base is composed of magnetic observatory data, surface survey data (which contains land, some aeromagnetic, some

total intensity marine, and three component marine data),high-quality aeromagnetic,

high-quality total intensity marine data, satellite data, and repeat data. These

individual data categories are described in detail in a series of notebooks in the

Geodynamics Branch, GSFC. This catalog reviews the original data sets, the processing history, and the final data sets available for each individual category of

the data base and is to be used as a reference manual for the notebooks. Each

data type used in geomagnetic field modeling has varying levels of complexity

requiring specialized processing routines for satellite and observatory data and

two general routines for processing aeromagnetic, marine, land survey and repeat

data.

17. Key Words(Suggestod by Author(s))

Geomagnetics

Data Base

Spherical Harmonic Analysis

19. Security Classif. (of this report)

18. Distribution S_tement

Unclassified - Unlimited

Unclassified

20. Security Classif. (of this page)

Unclassified

Subject Category 46

21. No. of pages

104

22. Price

NASA FORM 1628 OCT 86

National Aeronautics and

Space Administration

Washington, D.C.

20546

official_se

Penalty foe Prlvate Use. e300

Postage and Fees Peid

Nationel Aeronautics and

Spece AdmiNst ration

NASA-451

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POSTMASTER If Unddiverable (Secdoa I_

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