J.HCI V XUlACiJL i-'Li-l. Library, H.W. Bldg

MAR 2 2 1965

^ecknicaL <ylote ^Uo. 305

ATLAS OF FOURIER COEFFICIENTS

OF DIURNAL VARIATION OF foF2

PART II.

DISTRIBUTION OF AMPLITUDE AND PHASE

William B. Jones and Roger M. Gallet

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
National AUG 5 1965

130,141

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technical 92©te 305

Issued February 14, 1965

ATLAS OF FOURIER COEFFICIENTS

OF DIURNAL VARIATION OF foF2

PART II.

DISTRIBUTION OF AMPLITUDE AND PHASE

William B. Jones and Roger M. Gallet

Central Radio Propagation Laboratory

National Bureau of Standards

Boulder, Colorado

NBS Technical Notes are designed to supplement the Bureau's regular publications program. They provide a means for making available scientific data that are of transient or limited interest. Technical Notes may be

listed or referred to in the open literature.

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington D.C. 20402

Price: 60 cents

Ill

CONTENTS

Page

1. Introduction , , x

2. The Basic Input Data 4

3. Fourier Analysis 5 3.1 Fourier Components 5 3.2 Analysis of Random Noise 6

4. Description of Graphs and Tables 10

k.l General Description 10

k.2 Amplitude Distribution 11

4.3 Phase Distribution 12

Acknowledgments 21

5. References 23

Graphs and Tables

Harmonic 1 27-34

Harmonic 2 35-^2

Harmonic 3 ^3-50

Harmonic k 51-58

Harmonic 5 59-66

Harmonic 6 67-7^

Harmonic 7 75-82

Harmonic 8 83-90

Harmonic 9 91-98

Harmonic 10 99->106

Harmonic 11 107-114

ATLAS OF FOURIER COEFFICIENTS OF DIURNAL VARIATION OF foF2

PART II. DISTRIBUTION OF AMPLITUDE AND PRASE

William B. Jones and Roger M. Gallet

This atlas is devoted to the study of amplitude and phase

from the diurnal analysis of foF2 monthly median. It is

concerned with their variations - both systematic and random - as functions of latitude, season and solar activity. The

atlas contains a series of graphs of the distribution of

amplitude and phase and tables of phase distribution for four

seasonal months of high and low years of solar activity.

Emphasis is placed on the study of the phase distributions

for determining the optimum separation of harmonics produced

mainly by noise from those representing mostly real physical

variation.

1. INTRODUCTION

Extensive efforts have been made in recent years to solve the

problems of representing ionospheric characteristics on a world-wide

scale, including their diurnal variation, by objective analysis of

ionospheric data using high speed computers [Jones and Gallet, i960,

1962a, b, 1965; Jones, 1962; Hinds and Jones, I963]. In this work, the

analysis is made in two main parts, (l) For the diurnal variation, the

2k hourly measurements from each available station are Fourier analyzed.

(2) The geographic variation of each Fourier coefficient is analyzed

and represented by series of orthonormal functions in latitude and

longitude, equivalent, in a sense, to surface spherical harmonics.

In the work cited above, major emphasis is placed on obtaining

optimum separation of noise (i.e., random fluctuation of ionospheric

data) from real physical variation. From studies of Fourier power

spectra in the diurnal analysis of foF2 monthly median [Jones and Gallet,
-2-

1962a, Section h~\, it is shown that certain harmonics are produced

mainly by noise, whereas other harmonics represent mostly real physical

variation. The proper separation of these harmonics and resulting

truncation of the Fourier series give the optimum smoothing as well as

the desired diurnal representation. A number of additional investigations have been made to determine the proper separation of harmonics,

including that of the distribution of amplitude and phase. That

investigation is the object of the present atlas.

The first Atlas of Fourier Coefficients of Diurnal Variation of

foF2 [Jones, 1962] (hereinafter referred to as Part i) is devoted to

studying the variations (both systematic and random) of the sine and

cosine components. The present atlas (Part II ) deals with the

variations of amplitude and phase as functions of latitude, season and

solar activity. These are studied by means of a series of graphs of

amplitude and phase distribution and tables of phase distribution for

four seasonal months of high and low years of solar activity.

The form of presentation used here has two main advantages over

that employed in Part I. (l) Physical properties are more easily

interpreted in terms of amplitude and phase than in sine and cosine

components. (2) The effect of noise on the various harmonics is more

clearly distinguishable in the distribution of phase than in the

distribution of the other three Fourier components. This latter

advantage is exploited, in Section h, for determining the optimum

separation of harmonics.
-3-

The regular and systematic behavior found in this series of graphs

and tables has been instrumental in solving the problems of ionospheric

mapping by numerical methods. Although more objective methods have

been used to study the physical variations and effects of noise in

ionospheric data, the graphical representations presented here have

guided the development of mapping methods and have added insight to

understanding the complex properties of the ionosphere.

The ionospheric characteristic chosen for this study is the monthly

median of the F2-layer critical frequency (foF2), because of its

physical significance as well as practical importance in radio

propagation. Similar investigations have been made for other

characteristics of the ionosphere, such as the 3000 km maximum usable

frequency factor ( F2-M3000 ) . For that quantity the main variations are

weaker than for foF2, but. again they are found to be regular and

systematic.
- k -

2. THE BASIC INPUT DATA

The basic data used for this Atlas (Part II ) are the same as for

Part I. They consist of 2k hourly medians of foF2 from all available

ionospheric stations for the four seasonal months, March, June,

September, and December, for each of the last minimum and maximum years

of solar activity (195^ and 1958). Table 1 gives the total number of

stations available at the time this study "was made and the Zurich

sunspot numbers for each month. The data were punched on cards as they

had been tabulated in ionospheric booklets ( or in some cases on microfilm)

without prior smoothing. In a few cases it was necessary to reject data

from certain stations if, for example, so many consecutive hourly values

were missing that the diurnal curve could not be defined, or if the data

were grossly inconsistent with those from closely neighboring stations.

For the IGY year (19 58) there were about twice as many stations as for

195^> and so the world-wide coverage was considerably better, particularly

in the southern hemisphere.

TABLE 1

Number of Stations and Zurich Sunspot Numbers (ZSN):

(A) Monthly Mean and (B) 12 Month Running Average

195^ 1958

Mar. Jun. Sep. Dec. Mar. Jun. Sep. Dec.

Stations 66 68 63 6k 118 118 113 118

ZSN (A) 10.9 0.2 1-5 7.6 190.7 171.5 201.2 I87.6

ZSN (B) k.2 k.2 7.8 12.0 201.3 186.8 I83.8 180.5
- 5 -

3. Fourier Analysis

3.1 Fourier Components

The 2k hourly medians of foF2 have been Fourier analyzed for each

available station,, each in its own zone time. As a result, the diurnal

variation at each station is decomposed into 11 harmonics,

a. cos jt + b . sin jt = c . cos («jt - \|r . ), j * 1, 2, . .., 11, (l)"

J J J J

and a constant term a , which is the arithmetic mean of the 2k medians . o' Each harmonic is defined by an amplitude c . and a phase angle i|f . or,

equivalently, by cosine and sine coefficients a. and b., respectively.

The Fourier components have been corrected to local mean time (IMT) by

means of a shift in the phase angles determined by the difference in

the station longitude and reference longitude of the time zone. The

variable t denotes local mean hour angle related to IMS (in hours) by

t = 15° (IMP) - 180°. (2)

Thus, for example, t = at noon LMT.

"There is also an additional term, a,p cos 12t, which is omitted here

since it does not form a complete harmonic and since it is produced

mainly by noise.
- 6 -

Formulas for computing the Fourier components are summarized byJones and Gallet [1962a, Section 3.1]. Only the relations connecting

them will he given here

a. = c. cos \|r

b. = c. sin ilf

(3)

[~2 2 b

i c . = /a . + b .

"dr . = arctan —^ . J V J J a

j

3.2 Analysis of Random Noise

For use in the following section, a brief discussion is given here

of certain properties of ionospheric data and of the Fourier analysis of

random noise. Ionospheric data may be considered as sampled values y.

from a function f(x) which is the sum of two components: (l) the real

physical characteristic f,(x) and (2) a random noise component f

p

(x).

Thus each ionospheric datum is a sum

yt - y{

1] + 42)

,

where (k)

y

(

. X)

= f^x.) and y^

2)

= f

2(x

±

).

(2) The values of the noise y . ' are assumed to be independently, normally

distributed, with mean zero and standard deviation a, a quantity used as

a measure of the noise . Table 2 contains estimated values of the average

noise <j in foF2 medians for each month considered. These values are

computed as described by Jones and Gallet [1962a, Section k"]. A value

of a is given for all stations taken together for a given month and for
TABLE 2

Average Noise <j (Mc/s) in foF2 Medians

195^ 1958

Mar. Jun. Sep. Dec. Mar. Jun. Sep. Dec.

All Stations 0.17 0.15 0.19 0.19 0.25 0.2U 0.29 0.27

Selected Latitude

Bands :

60° < X s 90 0.10

(7)

0.057

(11)

0.076

(7)

0.10

(6)

0.32

(28)

0.15

(28)

0.26

(28)

0.30

(27)

30° < x *

60° 0.11

(26)

0.10

(25)

0.1U

(23)

0.15

(23)

0.19

(hi)

0.12

(39)

0.20

(te)

0.22

(39)

-30° < x* 30° 0.214- (23)

0.21

(22)

0.28

(23)

0.26

(2k)

0.28

(28)

0.29

(32)

0.36

(2k)

0.30

(3*0

-60° < x * -30° 0.15

(8)

O.lU

•(8)

0.12

(8)

0.1U

(9)

0.23

(9)

0.35

(10)

0.31

(11)

0.25

(12)

-90° * X <; -60° 0.11

(2)

0.071* (2)0.13

(2)

0.12

(2)

0.25

(12)

o.ia

(9)

o.te

(8)

0.17

(6)

57(Numbers in parentheses indicate numbers of stations contained within tb«= particular latitude bands .

)
- 8 -

each of five selected latitudinal bands. For each fixed month, a appears

to have a significant latitudinal variation. To verify this observation,

the likelihood ratio test [Hoel, pp. I89-I66, 195*0 has been vsed to test

2

the equality of the variances cr from the five separate latitude bands

for each month. In each case the estimate of x ( chi- square) obtained

from this test was considerably beyond the 1$ critical value. Hence it

was concluded that the latitudinal variation of o is significant.

Variations in a with seasons and solar activity also appear, but these

do not play an important role in the present study.

,(2) (2) (2)

Now suppose that a sample of values y\ 9 -y\ , >••> J2k

of the

random noise function f

p(x) is Fourier analyzed. The statistical

distribution of each Fourier component may be derived from the asymptotic

solution for a random walk. Following Chapman and Bartels {.1$k0, PP« 572-

582] we set

s

i = 12 yi cos Jx

i

and h

i = 12 yi

sin Jxi'

^

(2) where the x. are the 2k equidistant hour angles at which the y^ are

measured. Then the Fourier coefficients

2k 2k

a

j = X

si

and b

i = y h

i* j = -^ 2

> •••» i;l ^

1 1

become the coordinates of a random walk of 2k steps (g., h.)« It follows

from a theorem of Markoff that a. and b. have independent, normal
- 9

-

2 2 distributions with mean zero and variance a /12. Thus it can he shown

that the phase i|r . is uniformly distributed and the amplitude c . has a

Rayleigh distribution with probability density function

r p(r) = —r— exp

CT /i2 l *76 J

2r

2

=£ r < oo (7)

2

The expected values of c . and c . are found to be

J J

E( c j) = Jh <J > and E(c

j

)= f" (8)

respectively, independent of the frequency j

It is clear that the phase f. is the only one of the four Fourier

J components whose distribution will be independent of the noise a. This

is a useful result for testing harmonics, obtained from Fourier analysis

of ionospheric data. For example, consider the distribution of phase

angles i|f . from all available stations for a given month, for a harmonic

J which is produced mainly by noise. From the preceding discussion, all

of the phase angles would belong to a common uniformly distributed

population, which can be tested by the standard chi-square test. On the

other hand, with a different Fourier component, say amplitude, the c

J from different stations would not belong to a common Rayleigh-distributed

population, since the distribution of the c . depends on a which, in turn,

J varies with geographic position (see Table 2). Thus the phase is the

simplest Fourier component to use in such a test. Results of this nature

are discussed in the following section.

2

TTote: These are the same for all frequencies.
- 10 -

k. Description of Graphs and Tables

k.l General Description

The present atlas contains a series of illustrations, each

consisting of two main parts: (l) a graph in polar coordinates of the

distribution of amplitude c . and phase \j/ . for all stations for a given

J J month and harmonic and (2) corresponding tables of the distribution of

phase for all stations combined (marked TOTAL) and for stations grouped

in latitude bands of 30 width. In each case the distribution is

described by giving the number of phase angles in each of four quadrants.

For example, in the illustration of Harmonic 2 for September 1958, the

table

TOTAL

80 12

Ik

implies: 12 phase angles between and 90 (Quadrant i), 80 phase

angles between -90 and (Quadrant II ), 1^ phase angles between -180

and -90 (Quadrant III) and 6 phase angles between 90 and 180

(Quadrant IV ). The number appearing in the corner of each box refers

to the number of stations in the latitude band.

The basic graph shows the distribution of both amplitude and phase.

Amplitude is measured radially by a scale given just above the graph.

The amplitude scales, though fixed within a given harmonic, are expanded

for certain harmonics (e.g., 2, 3, k and 7) to compensate for diminishing

size in amplitude. Phase is measured from the upward vertical ray,
- 11 -

positive in the counter-clockwise direction. Thus, for example, in

Harmonic 1 the points of the graph act as hour hands of a clock giving

the time displacement of maximum foF2 median from noon (IMS =12).

Phase angles of -15 , , and 15 refer to displacements of one hour

before noon, zero hours before noon, and one hour after noon,

respectively. The coefficients a. and b. can also be seen indirectly

since they are the projections on the vertical and horizontal axes .

In a sense, the graphs are three-dimensional since approximate

station latitude is signified by use of special plotting symbols. The

symbol for each latitude band is defined in the tables of phase

distribution. Variations with season and solar activity are

illustrated through the study of four seasonal months (March, June,

September and December) for each of the years, 195^+ and 1958, of low

and high sunspot number (see Table l). For each harmonic the material

is so arranged that the equinox months (of the same year) appear on

opposite pages, 1958 followed by 195^- In a similar order these are

followed by the solstice months.

k.2 Amplitude Distribution

A number of variations of amplitude are apparent, perhaps the most

prominent being that connected with solar activity. Amplitude increases

with sunspot number in all harmonics; yet, the main trends in the

amplitude distributions are preserved from year to year. For solstice

-'The graphs were produced by machine, plotting the a . and b . in

rectangular coordinates.
- 12 -

months, amplitude is generally larger in winter than in summer. In

equinox months, it reaches its maximum in the equatorial bands and

decreases in the polar directions (particularly in Harmonics 1-8).

As an illustration of strong variation in amplitude and phase, we

call attention to Harmonic 2 for December 1958. Amplitude increases

from a low of 0.2 Mc/s to a high of about 2.5 Mc/s between 9° N and

60 N and then drops to a low of about 0.8 Mc/s between 60 N and 30 N.

It climbs to a second maximum of 2.8 Mc/s between and 30 N and

then drops to relatively low values in the southern hemisphere. This

dramatic latitudinal variation of amplitude is accompanied by a

continuous shift in phase from +60 to -75 (through Quadrants I and

II). Possibly a similar phenomenon occurred in the southern hemisphere

in June 1958, but it is not clearly defined, perhaps due to the much

fewer stations.

^.3 Phase Distribution

The distributions of phase are characterized by (l) systematic

clustering of phase angles for low order harmonics and (2) comparatively

uniform distribution for high order harmonics. These properties - to

be expected from theory outlined in Section 3 - are useful for

separating the harmonics produced mainly by noise from those representing mostly real physical variation.

For Harmonic 1 the main characteristic of phase distribution is

the predominance of phase angles in Quadrant I, the distribution for

all latitudes and all months combined being given by
- 13 -

27 677

11 12

Variations of a secondary nature also appear. For example, in

Harmonic 1 for March 1958, the majority of phase angles are clustered

between and 60 ( signifying shifts in maximum foF2 median of to k

hours after noon IMT). A small group of mostly equatorial stations,

however, have their phase angles between 60 and 90 ( shift of maximum

foF2 median of k to 6 hours after noon IMT). This separate grouping of

equatorial phase angles is repeated, with slight variations, in

September 1958 and also in both equinox months of 19 5^ •

By studying the graphs and tables given in the following series,

many such apparent variations in the distributions of phase can be found.

Our present interest, however, will be centered around the main trends

in these distributions and the separation of uniform distributions from

those exhibiting significant clustering features. For this purpose, we

consider the distributions of phase for the equinox months of both years

taken together in Table 3* As can be seen, Quadrant I is predominant

for harmonics 1, 5 and 9j Quadrant II for harmonics 2, 6 and 10;

Quadrant III for harmonics 3> 7 and 11; and Quadrant IV for harmonics

k and 8. It is clear that the phase distributions tend to become more

uniform with increasing harmonics.
- 14 -

TABLE 3

Distribution of Phase and Values of x ( Chi- square)

from Diurnal Analysis of foF2 Median

for March and September of 19 5^ and 19 58

Quadrant

Harmonic I II III IV

zX

1 352 3 3 2 1017

2 77 195 61 27 178

3 8 hi 267 38 472

h 116 26 38 180 173

5 213 79 29 39 240

6 53 155 117 35 104

7 ^3 60 185 72 138

8 113 60 44 1^3 71

9 157 79 5^ 70 70

10 73 118 110 59 27

11 81 79 109 91 6
15 -

To compare these distributions with an exactly uniform distribution,

Table 3 also gives values of the variable x (chi-square)

I? ,a - HP .2 x - I

( V }

> (9)

i=I

where a. denotes the number of phase angles in the ith quadrant,

N (=360) is the total number of phase angles (for the equinox months

combined), and P. (=1/^) is the probability of a phase angle from the

uniformly distributed population being in the ith quadrant. A graph of

2

the x values is shown in Figure 1.

2

With three degrees of freedom, the probability of x > 11.3^- is

0.01, if the distribution sampled is in fact uniform. Using this as a

criterion, one could conclude that only Harmonic 11 is uniformly

distributed. Yet, it is evident that the high order harmonics are

definitely more uniform than the low order ones and that a natural

cutoff could be made after Harmonics 5> 7 f 9 and 10. There appears to

be a twilight zone in which the optimum cutoff could be made. It

2

should be pointed out that the low values of x for Harmonics 2 and k

appear to be the result of systematic latitudinal variations of phase

which make the combined distributions appear uniform.
- 16

CVJ

CMX

HARMONIC

FIG. 1 VALUES OF CHI-SQUARE (X

2

) FOR

UNIFORMITY OF PHASE DISTRIBUTIONS

DIURNAL ANALYSIS OF foF2 MEDIANS

MARCH AND SEPTEMBER

OF 1954 AND 1958.

TESTING

FROM

FOR
- IT -

In a similar manner, Tables k and 5 contain the distributions of

2

phase and corresponding values of x for June and December, respectively,

2 with both years combined. Graphs of the x

values are shown in Figures

2

2 and 3* Here the x test (using the one per cent criterion) leads us

to conclude that for June Harmonics 5 through 11 are uniformly

distributed in phase, whereas for December Harmonics 6 through 11 are

uniform. These results appear to be in close agreement with those

determined from studies of the Fourier spectra [Jones and Gallet, 1962a],
-18-

TABLE k

Distribution of Phase and Values of x (Chi-square)

from Diurnal Analysis of foF2 Median

for June of 1954 and I958

Quadrant

Harmonic 1 II III IV

2

X

1 162 13 h 7 383

2 37 75 57 17 4o

3 37 20 88 41 55

4 55 25 40 66 20

5 56 44 he Uo 3

6 he 40 59 4i 5

7 h9 45 52 40 2

8 k8 37 52 h9 3

9 hi 43 37 59 5

10 45 53 38 50 3

11 hG hG 62 32 10
- 19 -

TABLE 5

Distribution of Phase and Values of x ( Chi- square)

from Diurnal Analysis of foF2 Median

for December of I95I+ and 19 58

Quadrant

Harmonic I II III IV

2

X

1 163 11 h 3 230

2 83 83 13 2 127

3 32 33 85 31 k6

h 21 22 79 59 5h

5 60 26 49 k6 13

6 58 30 ^5 H3 9

7 56 36 52 37 7

8 39 ko 55 i+7 It9 kk 39 60 38 7

10 Uo V7 41+ 50 1

11 kl

> ^5 ^7 k8 o.k
- 20 -

i

CMX

FIG. 2

VALUES OF CHI-SQUARE (X

2 )FOR TESTING UNIFORMITY

OF PHASE DISTRIBUTIONS FROM DIURNAL ANALYSIS

OF foF2 MEDIANS
- 21 -

ACKNOWLEDGMENTS

The authors gratefully acknowledge valuable assistance from a

number of persons and facilities at the Boulder Laboratories of the

National Bureau of Standards. The basic ionospheric data vere

supplied by the Ionospheric World Data Center. Mrs. J. Kaye Myers was

responsible for preparing the ionospheric data on punched cards and for

computer program applications. The computer programming was performed

by Mrs. Virginia L. Rios. Able assistance in preparing the graphs and

tables was given by Miss Anna M. West and operators in the Central

Computing Facility.

- 23 -

5. References

Chapman, S., and J. Bartels (19^), Geomagnetism, II, 572-582 (Oxford at

the Clarendon Press).

Hinds, M. E., and W. B. Jones (1963), Computer Program for Ionospheric

Mapping by Numerical Methods, NBS Tech. Note l8l.

Hoel, P. G. (195*0 > Introduction to Mathematical Statistics, Second

Edition (John Wiley and Sons, Inc., New York).

Jones, W. B. (1962), Atlas of Fourier Coefficients of Diurnal Variation

of foF2, NBS Tech. Note lk2.

Jones, W. B., and R. M. Gallet (Dec. i960), Ionospheric Mapping by

Numerical Methods, J. of the International Telecommunication Union,

No. 12, 260-264.

Jones, W. B., and R. M. Gallet (May 1962a), Representation of Diurnal

and Geographic Variations of Ionospheric Data by Numerical Methods,

Telecomm. J. 29, No. 5, 129-11*9; also published (July-Aug. 1962a),

J. Res. NBS 66D (Radio Prop.), No. k, ^19-^38.

Jones, W. B., and R. M. Gallet (Nov. -Dec. 1962b), Methods for Applying

Numerical Maps of Ionospheric Characteristics, J. Res. NBS 66D

(Radio Prop.), No. 6, 6^9-662.

Jones, W. B., and R. M. Gallet (1965), Representation of Diurnal and

Geographic Variations of Ionospheric Data by Numerical Methods,

Part II. Control of Stability; to appear in the Telecommunication

Journal.

- 25

SERIES OF GRAPHICAL REPRESENTATIONS OF

AMPLITUDE AND PHASE AND

TABLES OF PHASE DISTRIBUTION FROM

DIURNAL ANALYSIS OF foF2 MONTHLY MEDIAN

-27-

-60°

-90°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 AMPLITUDE SCALE (Mc/s)

-30°

HARMONIC I 118 STATIONS

4

I 30°

/ aoo / >v / \

/ \X/C \\ ^^"""1\ _/

j* —^ U^\/ ^r Q yv \\ S

/\. yX^ \ W jZfs. ° yff No V \s^

^s/ X \ A ^^*A X 5r \

1 >>C >c\ \

* j***\< ° J^\ A \

/ / ^^^ /\ \ \

' / /*r\ /U \ \ ^-—-^nf

/ ^r^--^ / ^\x"^ °x!>^ \ ^^C^^ \ i / /--—^ y' ° »v —

T~~^

\ 1

I

i »°r i * i 1

\ — —\ * L I* \ \ /

*— ill

-150° 180° I50 c

60°

SO

120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? 15 e 41 e 26

15 41

1 1 28

SOUTH

A 12 9 * _?J 9

' ,3 9

1

1 2

TOTAL

12
-28-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC I AMPLITUDE SCALE (Mc/s)

-30°

112 STATIONS

2 4

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V

13 o 42 ° 1 26

13 42 1 28

SOUTH

a

1 1 1 1 * 7

1 1 1 1 7

TOTAL
-29-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

-60°

-90°

120°

MARCH 1954 AMPLITUDE SCALE (Mc/s)

-30°

HARMONIC I 67 STATIONS

4

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 14 o 26 o 7

14 26 7

SOUTH

&

9 9

*

2 9 9 2

TOTAL

67
•30-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC

AMPLITUDE SCALE (Mc/s) 9

-30° 30

63 STATIONS4 T T

150° 180 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? 13 o 23 o 7

13 23 7

SOUTH

A 10 8

*

2

10 8 2

120°

TOTAL

63
-31-

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC I AMPLITUDE SCALE (Mc/s) 9

-30° 30'

18 STATIONS4 T

\ ^>010101^^\ > o ^\V

1

1 1 *"1

/ W\ /x ^ * / / >v / \

r* /\ / \ JK / / ^ X< * \ s' \

PVk /* \/^ \ \

/* / *s/ v J*c \ \ —3L /

/y'^ >c*^^ \ ^^A—" \

BKr op

I I o a"

o ^^. T—^^ / /

\

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 18 ° 3 33 o 4 17

18 2 1 39

2

SOUTH

A

14 10 * 2 6

14 10

1 9

60°

90 c

120°

TOTAL

98
-32-

-60°

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 AMPLITUDE SCALE (Mc/s)

-30° 30

HARMONIC I 116 STATIONS

4

leo 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 19 o 38 o 2 23

19 38 1

' 27

SOUTH

A

13 * 4 7 *

5

' ,4

1 12 1 6

TOTAL

105
-33-

-60°

-90°

•120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 AMPLITUDE SCALE (Mc/s)

-30° 30'

HARMONIC I 68 STATIONS4

T" I

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 13 25 o 2 9

13 25 II

SOUTH

&

9 1 7 * _ij 1 9 8 2

TOTAL

64
-3itAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

-60°

-90°

120°

DECEMBER 1954 HARMONIC I AMPLITUDE SCALE (Mc/s)

-30°

65 STATIONS

4

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 14 o 4 19 ° 1 5

14 23 6

SOUTH

A

10 10 *

10 10 2

2

TOTAL

58
-35-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 2

AMPLITUDE SCALE (Mc/s) 9 1 -30° 30°

118 STATIONS

2 T

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 14 1 27 10 8

7 17

15

1 3

41

1 3 28

SOUTH

* 13 * 8 * _2j 1

13

1 9

4 5

12

TOTAL

7 I 29

I I
-36-

-60°

-90°

•120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 AMPLITUDE SCALE (Mc/s)

-30° 30°

HARMONIC 2

o

180

112 STATIONS

2

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 13 ° 1^ 2

o 13 9

13

7 42

2 4 28

SOUTH ^ "

* 9 * _l| 1

1 1 2

1 1 3 27

TOTAL

80

14

I 2
-37-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 2

AMPLITUDE SCALE (Mc/s) 9 1 r

-30° 30'

67 STATIONS

2 T

-60°

-90°

120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 7 • 9 9 o 2 3

1 14 6 2 26

1 1 7

SOUTH

* 6 3 3 3 * 2

9

3 9 2

TOTAL

28 25
-38-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 2

AMPLITUDE SCALE (Mc/s) 9 i j

1 -30° 30'

63 STATIONS

2

150° 180 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* I 6 1 1 o 1 5 1 13 19 2 23 3 3 7

SOUTH

* 7 1 * 4 3 * _2^

2

10

1 8 2

TOTAL

I 6

29

I I
-39-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 2

AMPLITUDE SCALE (Mc/s) 9 1 j

1 -30° 30'

118 STATIONS

2

-60°

-90°

120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 9 7 ° 26 2 ° 9 6

1 1 18 10 1 39 10 3 28

SOUTH ^ ±3J * 4 5 *

3 2

1 141 10

1 3 9

120°

TOTAL

64

24

22
-ko-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 2

AMPLITUDE SCALE (Mc/s)

-30°

I

116 STATIONS

2 T T

30°

150° ieo 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 18 1 e 9 29 • 5 22

19 38 27

SOUTH

* 13 1 10 1 * 1

14

I 12 4 1 6

TOTAL

56 54
-41-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 HARMONIC 2

AMPLITUDE SCALE ( Mc/s

-30° 30'

HARMONIC

l 68 STATIONS2

i

-60°

-90°

•120°

1 /"z v *

O 1 n °1

1 1 1 "b ° •»

\ \ —""A— *^» ^

\_^ \ \ ^/y. /a / 1

\ \ 3/ \

^^j^ / /

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 1 1 o 2 ° 3 4 7

,3 23 25 6 2

..

SOUTH

* 5 4 8 A

2 9 8 2

60°

TOTAL

I I

33

15

90°

120°
42-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 2

AMPLITUDE SCALE (Mc/s)

65 STATIONS

2

-60°

-90°

-120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 8 3 ° 6 17 o 1 4

3

14 23 ' 6

SOUTH

A _d 2 5 2 *

1

i 10 3

10

1 2

TOTAL

27 29
-43

-

-60°

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 3

AMPLITUDE SCALE (Mc/s)

-30°

118 STATIONS

1.0

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 1 ° 3 6 4

12 2

15 37 1 41

1 1 7 28

SOUTH

£ * 1 * 7

1 1 2 13 8

9

3 2

,2

TOTAL

8 2 I 4
-kk-

-60°

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 3

AMPLITUDE SCALE (Mc/s) 9 1—

-30° o 30

.5

112 STATIONS

1.0 T

1.5

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v a 2 7 3

1 1 2

,3 37 3 42

16 2 28

SOUTH

a

1 *4

8 3

1, 9 1 II 3

7

TOTAL

84 I I
-45-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

-60°

-90°

-120°

MARCH 1954 AMPLITUDE SCALE iMc/s 1HARMONIC 3 67 STATIONS

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? ° 1

II 3

.4 24 2 26 4 2

7

SOUTH

A 1 * 2 9 9

8

9 2

TOTAL

56
-1+6-

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 3 63 STATIONS AMPLITUDE SCALE (Mc/s) 9 1 r 1 j

-30c 30°

150° ieo

1.5

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V " 7

o

1

1 1 2

,3 16 23 5 1 7

SOUTH

* 2 1 *

1 7 1 10 5 2 8

1 2

TOTAL

45
•1+7-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 3

AMPLITUDE SCALE (Mc/s) 9 1 -30° 30

118 STATIONS

5 1.0

150° 180° I50 c

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 1 6 ° II 6

15 3

,8 5 27 39 8 3 28

SOUTH

A * 1 * 4 1 14

14 9

10 4

9

1.5

/ 7\ *^\ \ V

11 J*'

y^ \i

lk \ -X^X s / 1

\ A / ^V / /

vv * \/ >w* / * x V v—

/

\^^^ \y / v /\ /"^^^ / /\ / * ^NA / ^/^~~—

_

B u\ \/ \y /

"\ \ / \ /V /

TOTAL

I 7

55 33

60°

90 c

120°
-k8-

-60°

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 3

AMPLITUDE SCALE (Mc/s) 9 1 -30° 30

116 STATIONS

.5 l.O 1.5

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v ° 13 2

o 7 16 17 2

19 23 38

1 3 27

SOUTH

a

3 * _2J

2 8 3

,4 3 9

,2

2 6

TOTAL

2 2 23

52

20°
-1+9-

-60°

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 AMPLITUDE SCALE (Mc/s)

-30° 30°

HARMONIC 3

.5 68 STATIONS1,0 1.5

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v o 1 18 o 2 3

12 1 13 4 2 25 3 3

II

SOUTH

&

1 *

2 9

9

5 2 8 2

TOTAL

24

33
-50-

-60°

-90°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 AMPLITUDE SCALE (Mc/s)

-30° 30°

HARMONIC 3 65 STATIONS

1.0 1.5

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 8 2 ° 2 4

12 2

.4

1 1 2 23 6

SOUTH

a

2 1 * _|l

5 3

.0 4 5

10

1 2

TOTAL

33 I 2
-51-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 4

AMPLITUDE SCALE (Mc/s) °p—

-30° o

.20

8 STATIONS

.40 T T

-150°

DISTRIBUTION

OF THE

PHASE

180° 150°

60

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? ° 2 12 • 3 10 4 II 15 6 21 41 8 7 28

SOUTH

6 1 3 * 4 3

2 10 13

1 5 9

5

12

TOTAL

29

59
-52-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 4 112 STATIONS AMPLITUDE SCALE (Mc/s) °p , ^ , y—

-30° 30°

.60

50°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? 3 2 17 • 5 10

1 9

13 23

42

3 10 28

SOUTH

* 1 3 2 2 8

II 8

II

1 4

7

TOTAL

35

62
-53-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 AMPLITUDE SCALE (Mc/s)

-60c

-I20c

HARMONIC 4 67 STATIONS

.00 .20 .40

1 1

' 1

60

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 4 1 10 • 2 1 10

14 3 12 26 2 2

7

SOUTH

£

6 6 *

1

1

i 2

" 9

3 9

1 2

TOTAL

28

30
54-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 AMPLITUDE SCALE (Mc/s)

HARMONIC 4

oo 63 STATIONS

.20 .40

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 3 5 ° 1 10 » 3 5

13

12 23 2 2 7

SOUTH

* 1 1 4 1 1

1 7

,0

1 3

8 2

TOTAL

24

29
-55-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 4

AMPLITUDE SCALE (Mc/s) °p 1—

-30° 30°

118 STATIONS

.20 .40 T

-150°

DISTRIBUTION

OF THE

PHASE

150°

60 1

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* ' 6 10 21 • S 3 2 9

,8

1 7 39

7

SOUTH

£k

1 *

4

2 " 14 8 2 10 4 1 9

TOTAL

24

35

42
-56-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 AMPLITUDE SCALE (Mc/s)

HARMONIC 4

.00

116 STATIONS

20 .40

-150°

DISTRIBUTION

OF THE

PHASE

I50 c

120°

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

<7 • 13 4

1 18 19 36 2 388 2 27

SOUTH

* 2 3 6 * 2 1 2 10 14

1 2

12 2 1 6

TOTAL

20

50

I I

35
-57-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 AMPLITUDE SCALE (Mc/s)

HARMONIC 4

.00

68 STATIONS

.40

-150°

DISTRIBUTION

OF THE

PHASE

180° 150° LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 2 8 4 4

o 5

3

13

1 16 25

4 2

,,

SOUTH

4

1 2 * 1 1 4 2 9

7 1 8 2

TOTAL

16

20

24
-58-

-60°

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 4 C5 STATIONS AMPLITUDE SCALE (Mc/s) °p , y , ^—

-30° 30°

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? e e

3

3 1 1 14

19 4 23

1 2 6

SOUTH

a

3 * 2 4

* 4 3 10

1 3 10

1 1 2

TOTAL

29

10 24
-59-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 5 118 STATIONS AMPLITUDE SCALE (Mc/s)

-30° 30°

00 20 T

-150°

DISTRIBUTION

OF THE

PHASE

ISO

60

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

" -^ 12 o 2 32 ° 8 5 2

15 7 41 1 1 4 28

SOUTH

A 1 1 1 * _ll 6 * 3 4

1 13 2 9

3 2

12

TOTAL

70

14
-6oAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 5 112 STATIONS AMPLITUDE SCALE (Mc/s) °p £ ^j , '^—

-30° 30°

-150°

DISTRIBUTION

OF THE

PHASE

180° 150°

.60

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 5 6 jol 27 10 1 1

1 1 131 4

42

4l 3

1 28

SOUTH

* I 10 * 3 7 *

2 1

1 1

1 .1

1 3 7

TOTAL

3 I 62
-61-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 AMPLITUDE SCALE (Mc/s)

HARMONIC 5

.00 67 STATIONS

.40

-60°

-90°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 7 25 o 2 3

1 14

l 26 2

7

SOUTH

A 1 8 1 5 1

9

3 9

1 2

TOTAL

I I 48
•62-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 5

AMPLITUDE SCALE (Mc/s)

-30°

63 STATIONS

20 .40

-60c

-120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 7 9 9 • 3 3

13 a 1 23 1 7

SOUTH

* 2 5 i 7 *

2

1 2

10 8 2

TOTAL

21 33
•63-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 5

AMPLITUDE SCALE (Mc/s) °p ,

-30° 30'

118 STATIONS

20 .40 ~r

-60°

-120°

-150 50°

.60

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 2 12 17 1 o 4 8

3 1 18 14 7 39 6 10 28

SOUTH

a

13 3 *

1

' 14 7

10 4 4

9

TOTAL

23

27

38

30

120°
-6kAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDiAN

DECEMBER 1958 AMPLITUDE SCALE (Mc/s)

-30°

HARMONIC 5

.00

116 STATIONS

20 .40 T T

-60°

90°

-120°

-150°

DISTRIBUTION

OF THE

PHASE

.60

/

/ ^\ / \x \ \

l / rt/ *\/* v / tC /\ \ A——-^-jL / /\

/ /^^^V^ \ /\\ //Sw /* V"" y^/ )\x.\\ //a/y

• i * w i. _

17 \

v \ \

\ * \ ^-\^~^^ \ sK v H~!~—

\ • \ ^\ /Nl /*

\ /\ v' • / /

'

\

^^ \ • /V p ° ^\ \ /^ /N^ / °

J 1 r<\VrSC /

\ \ °/\

\o >A

"\ O \ ' \ ° vf^^

O 1

e 1

V/ /

\

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 17 o

2 ° 5 2 2

19

10 26 38

16 4 27

SOUTH

A

5 9 * 3 3 * 1 3

14 3 3

,2

1

' 6

TOTAL

I 4

30

36

36
-65-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 5

AMPLITUDE SCALE (Mc/s)

HARMONIC

.00

68 STATIONS

.40

-60c

•90°

120°

-150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

" 3 6 «» 10 1 • _5j 2

1 3

,3

12 2 25 3 1 II

SOUTH

£k 8 3 1 *

1 92 2

8

I 1 2

TOTAL

21

19

18
66-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 5

AMPLITUDE SCALE (Mc/s)

HARMONIC

.00 65 STATIONS

.20 .40 .60

-90°

-120°

-150°

DISTRIBUTION

OF THE

PHASE

ISO' 50° LATITUDE 0° TO 30° 30c TO 60° 60° TO 90°

NORTH

V 13 1 5

o 2 1

1 ,4

12 5 23 1 2 6

SOUTH

* 4 4 * 4 1 * 1 2

10 4 1 10 ' 2

TOTAL

I 2 24
.67-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

march 1958 HARMONIC 6

AMPLITUDE SCALE (Mc/s) °p 1—

-30° 30°

118 STATIONS

.20 .40 T

180' 50°

60

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 9 5 ° 16 9 ° 6 7

1 15 13 3

41 8 7 28

SOUTH

* 10 1 * 4 3 * _5I 3

1 1 13 2 9

2 2 ,2

TOTAL

50 28

27 I 3
-68-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 AMPLITUDE SCALE (Mc/s)

HARMONIC

.00

112 STATIONS

.40r

90°

-150°

DISTRIBUTION

OF THE

PHASE

180° LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 7 3

o ,4 3 7 5 3

13

21 4 42 1 1 5 28

SOUTH

* _5^ * 5 1 * _i) 2 5 1

1 1 4 1

1 1

1 2 7

TOTAL

40

45

I 4

I 3
-69

-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 6

AMPLITUDE SCALE (Mc/s) °p p-

-30° 30°

67 STATIONS

.20 .40 T

-60°

-I20c

-I50 c 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 9 • 17 3

o 2 4 M 14 4 2 26 4 1 7

SOUTH

* 7 1 5 2 * 2

1 9

2 9 2

TOTAL

40

15
-70-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 6

AMPLITUDE SCALE (Mc/s) °p 1

-30° 30°

63 STATIONS

.20 .40 T

150°

DISTRIBUTION

OF THE

PHASE

180° 150°

.60

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 3 1 • II 3 7 2

13

II 1 23

2 2

7

SOUTH

A 3 1 _3j 1 * 2 6

10 48 2

TOTAL

25

30
-71-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 AMPLITUDE SCALE (Mc/s)

-30°

HARMONIC

.00

118 STATIONS

.20 .40

-60°

90°

-120° 120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 2 ° 3 5 ° -*l

9

10

18 23 8 39 6 9 28

SOUTH 5 7 3 6 *

1 2

1 1 14 ' ,0

3 3 9

TOTAL

22

43

3 I

22
-72-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 6

AMPLITUDE SCALE (Mc/s) °p ,—

-30° o

20

116 STATIONS

40 .60

I

V

v / v\x \ \ ° v / y >< \s^ 5

tL-l / 9 X \ /-"C /^/\ X v \ ^^ \

/ «/ \/» .v^ \

7 °/ x^ \ ^^ \ V

\~^"^\ * )\* / TVS

\ \^^ VK / 1 \ 5^\ X^ ^V /

q /o-A^/ /

"~Y V N.0 A\ / /-

°\ V\ ° /\ /

\ 3<^^ n? x

60°

90°

120°

-150°

DISTRIBUTION

OF THE

PHASE

180° LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 3 14 4 12 ° 3 5 2

19 2 20

38

10 9

27

SOUTH ^ _5j 1 * 3 2 *

1 1 6 2

14 T 4

12 3 1 «

TOTAL

19

26

35

36
-73-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 AMPLITUDE SCALE (Mc/s)

HARMONIC 6

.00

68 STATIONS

.40

-60°

-120°

-150°

DISTRIBUTION

OF THE

PHASE

180' LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 3 1 5 5° 3 3 9

13

15 25

5

II

SOUTH

* 4 2 * 3 4 *

1 2 91 8

1 1 2

TOTAL

I 8

19
-JkAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 6 6 5 STATIONS AMPLITUDE SCALE (Mc/s) °p j—

-30° 30°

.20 T

T

.40 "T

-120°

-150°

DISTRIBUTION

OF THE

PHASE

20°

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

9 2 5

o 9 1 1 e

1 2 5 14

3 23

4 1 6

SOUTH

A 1 3 *

2

7 2

,0 6 1 10 2

TOTAL

I 9

23

I 2
-75-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 7 118 STATIONS AMPLITUDE SCALE (Mc/s) p , £ p- y- r

-30° o 30°

-150° 150°

.30

-60° / \. • V^ \

/ /^\ X \* \

*

/ / ^"-^ / \ • \ \

v / /

1 */ •/

\o ^ • / "~~~—-~? / /

\ \ N^"

\ s^ \ 9 / ^^^ / ^s. / '^^x / \^s^ \ r A /*^^L_ *

120° \ / ^sV * /

V / * /^^ /

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 4 2 I 1 2 * 7 6

8 1 15 26 2

41 9 6 28

SOUTH

^ -A

* 4 3

12

13 8 1 9 4 1 ,2

TOTAL

27

67

13

I I

60°

120°
-76-

-60°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 7

AMPLITUDE SCALE (Mc/s)

112 STATIONS

.20 r

-30° T

30°

60°

-90°

? Ol« ° '*. oo

3

vo

-120°

180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

" 1 1 5 7 7 4

10 1 13 22 8 42

8

SOUTH

A _J n 3 * 2 2 8 2

1 1 4 3

1 1 2 1 7

TOTAL

I 7

54

I 7

24
-77-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 7 6 7 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , 22- r

-30° o 30°

.30

-150° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 4 • 3 1 ° 1 3

7 3

.4 18 4 26

3 7

SOUTH

A

2 1 *2 6 9

4 5 9 2

TOTAL

35 15
-78-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 7

AMPLITUDE SCALE (Mc/s)

63 STATIONS

.20

-150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 3.0° 30° TO 60° 60° TO 90°

NORTH

* 1 1 2 3

6 5

13 8 13 23 3 1 7

SOUTH

* 3 * I * 1 7

10 4 3

8

1 2

TOTAL

29 2 2
-79-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 7 118 STATIONS AMPLITUDE SCALE (Mc/s) p , j

, y r

-30° 30°

.30

-120

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 5 ° -^ 12 9 8 9 4

.8

7 9 39

8 3 28

SOUTH

A -J 2 * -A 2 * 2 1

1 1 14i 1 ,0

2 4

9

TOTAL

29

38

30

2 I
-80-

-60c

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 7 116 STATIONS

OO 10 .20 AMPLITUDE SCALE (Mc/s) p , - 1

1 r -30° 30°

-150° 180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

' 4 1 10 25 ° 6 6

12 2

,9 2 1 38

6 9 27

SOUTH

* 1 1 * 2 3 * . 3 9 3

.4 3 4

.2 1 1 6

.30

\ / ^x. s\ °\

• / / ^X y' \ ^-

/ ^"^^ XX \ \

/ ^

s\ / x \ ° \

?•/ /°'/X ^\ \

/ —««w_#

I ~~~-^. / \ % o O \ s^ \^ ' \

/ ^"^/^ ^/ * ° ° \r ^\^^ \

w J ° 1 • - ! .1

\

A

.... ..... v a *—

\ ^-—\— ^-A?* ^

\ \ ^v / X.

\ \f x A^^—

\ -x^^ )( • / / s*\ /* \ / /

• * /- /

\ \ *\. / \^ /

\ * \ ^x x ^\^ /

o \ \ ^XX. /x^^

\ /^ ' /^/t-.

"

' \ \ * S ^X.

TOTAL

24

33

39

20

90°

120°
-81-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 AMPLITUDE SCALE (Mc/s)

HARMONIC

oo 68 STATIONS

.20 .30 T

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 3 3 " 7 10 e 3 3 4

,3 8 25

4 4

1

1

SOUTH

* _l] 1 *

_5J

1 *

1 6 1 9

1 1 8

1 2

TOTAL

16 19

.40

-30° <> 30°

-60°

/ * / /y

[ vB f„*«^ n

\ L-^— \ ^^ X. * yC ^

\ ^—-'—\ \ ^^^ A//"v^ ^-Cx. ^

s\

"i \ -X^\ y^ / / '

\ Y >^

-120° 120°
-82-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 7

AMPLITUDE SCALE (Mc/s)

65 STATIONS

.20

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

" 1 7 14 o 1 10 3

,4 2 23 2 3 6

SOUTH

A

_ij * 2 2 *

2 6

,0 2 4

.0

1 ' 2

TOTAL

I 2 I 7

.40

60°

90°
-83

-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 8 118 STATIONS AMPLITUDE SCALE (Mc/s) p , -j , y r

-30° 30°

.30

-150° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 1 4 o 6 15 • II 7 2 8

15 6 14

41 6 4

28

SOUTH

A

1 2 1 4

*

4 3 '

1 9

13 2 2 9

2 3

12

TOTAL

24

19

35

40
-84-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 8 112 STATIONS AMPLITUDE SCALE (Mc/s) °£ . ^ r .20 .30 ~r

-30° ( ) 30°

\/ \ ^"\ *

* /^^ <

-60° ^s^/ y\ \ \

i i / /

/ N. / >v yr\ \

•

/ / */

/ / ^"""^ * XX \ \

/ / * /\V/» \ \-

/ ^r^^ / \ V^* o\><V^

^ V

/ / ^^"-»^/ °* • V

-^

1 V^\ ' **

'

\ **r\ / /* I

o

»—lX*r • /x7 ^

\

A \v

\ \ ^^ \x / 1 ' »U \ \/

120° y^ \ XX. / / *

-150° 150°

60°

120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 2 4 4 20 • II 6

7

,3 3 1 5 42

4 7 28

SOUTH

A

1 2 * 2 4 * 2 2

1 7

1 1 2 31 1 2 1 7

TOTAL

22 38

40
-8 5

-

-60°

-90°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 8 67 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ 1 -i r

-30° o 30°

.30

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 1 2 3 6 • 3 3 2 9

,4 4 '3 -^26

1 7

SOUTH

A

3 *

' 3 6

9

1 5 9

' 2

TOTAL

10

14

35

120°
AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 8 63 STATIONS AMPLITUDE SCALE (Mc/s) p , j

, y r

-30° 30°

.30

150°

.40

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 1 3 ° -2J

15 2 2 9

13 6 23

1 2 7

SOUTH

A 1 4 * _l| 1 9

,0 2 2 8 2

TOTAL

26

28
-87-

AMPLITUDE. AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 8 118 STATIONS AMPLITUDE SCALE (Mc/s)

-30° 30°

.00 10 .20 .30 .40 T

-120

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 10 12 9 o 5 10 2 6

.8

12 4 9 28

SOUTH

* 1 3 1 1 *

_2J

1 3 7

,4 7 ' ,0

1 5 9

TOTAL

2 I

29

34

34
-88-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 8 116 STATIONS AMPLITUDE SCALE (Mc/s)

-I5C° 50°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 3 1 14 5 ° 3 10

7 8

,9

15 4 384 10 27

SOUTH

a

8 4 2 * 2 1

1 5 ,4

5 1 12 2 ' 6

TOTAL

26

34

27

29
AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 HARMONIC 8 68 STATIONS AMPLITUDE SCALE (Mc/s) p , -j , ^ r

-30° 30°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 2 5 10 2

o 2 5 3 3

,3 12 1 25 1 3

I,

SOUTH

A 1 2 1 *

3 3 9

4 3 8

2

2

.30

60°

90°

TOTAL

16

23
AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 8 6 5 STATIONS AMPLITUDE SCALE (Mc/s) °£ , -£ r .20

-30°

.40

60°

,A *** .*• A %

90°

-120°

-150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 606 TO 90°

NORTH

* 2 1 6 4 ° 1 I 4 7 14

12

' 23

1 3 6

SOUTH

* 2 3 2 3 * 1

1 4

10

3 2

10

1 2

TOTAL

14

21

I 2

I 8
-91-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 9 118 STATIONS AMPLITUDE SCALE (Mc/s)

-90°

-150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 2 6

a 4 25 ° 7 7

1 6

,5 2 10 41 8

SOUTH

* 1 9 * 1 5 * 1 3

3 ,3

1 2 9

3 5 12

60°

90°

20°

TOTAL

55

32
-92-

-90°

120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 9

.00 AMPLITUDE SCALE (Mc/s)

-30°

10

112 STATIONS

.20 ~r ~r T

30°

£ / / \/

/ ^w / \. • X/^

/ /\ /\ \ V* * 1 / / \ ^-^ \ Wo / / V/ \ a )lJ

., Jfi \° . n \ f\ \

1 o°Jl • o r oo «jf I \^^-^\ * ° * • • • /^^^^/

\ ^^\ s\ *

D *y\ /^—^

/

\ \ ^/^ \ / / 1 ' \ \ \f/ \- /

/^ \ / \y * / * \ ^\ ^v /

180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* -^ 9 14 10 9 5 2

13

10 8 42 7 7 28

SOUTH

a

1 1 3 2 * _!J

1

I I 3 3

I, 3 1 7

TOTAL

30

23

38

2 I

60°

90°
•93-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 9 67 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , ^ r -30° 30°

.30

-120°

-150° 180°

.40 1

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 2 8

o 4 17 o 2 1

1 3

,4 2 3 26

1 3 7

SOUTH

A

9 * 4 4 * 1 1 9

1 9 2

60°

90°

120°

TOTAL

40
-9kAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 9 63 STATIONS AMPLITUDE SCALE (Mc/s) p , i2 , 12

p

-30° o 30°

-120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

• 2 7 8 7 ° 4 1 3 1 13 4 4 23 2

7

SOUTH

A

2 5 3 3 *

1 1

1 2

,0 2 8 2

.30 .40

60°

90°

120°

TOTAL

20 24
-95-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 9

AMPLITUDE SCALE (Mc/s) p ,

-30° 30

•150°

10 ~r

118 STATIONS

.20 .30 T

-60°

' *<. / ^\/^ \ \ V

1 /

^S\. /x \ v V / / °

/ ~^^"-^^/ /v ^v v^ ^""^^C /

/ / —-£- / \. / • o

* \ ^

-90°

/ 7^^^ 7 * o A • \

•

\ \ \ ^/* \ o ## y^^V

\ JL-— \^ >X_ v • X.

\ >r\ /^^ / / * * \ 3c^

* Nv /

120°

60°

180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 4 6 7 7 5 5 i

,.

12 14 39 5 28

SOUTH

* I 9 * 1 1 *

_j\ 3

1 3

,4 2 6.0 2 2 9

TOTAL

23

27

29

39
9

6.

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 9

AMPLITUQE SCALE (Mc/s) p ,

-30°

10

116 STATIONS

.20 .30 T

-90°

120°

S. / \.yS \ \ v

/ /\!y j*: \

/ — / x • \ \ / NV A\ \ V / / • / \^ \ ^-V*

O >w^ \

^—' \

* * 1 V^^ A n° „•%• A„ ^^^/^ / \ \° oJ1 /\P / '—-^ / / \ J^ y^v* o >v» ^s. / ^~~~~~~^tL /

\ \ s^ \ s ° / / A \ o \. / ^>^ / / \ y?— /X. / ° / \v \ y/\ ^yt j

60°

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v -A

12 » 3 3 ° 5 6

i 3 .9 23 9 38 7 9 27

SOUTH

* 7 2 * 5 2 * 3 2 4 1 14 3 2

,2

1 6

TOTAL

26

39

27

24
-97-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 HARMONIC 9

AMPLITUDE SCALE (McA) p 1 1 1 1 r

-30° • 30°

.10 ~r

68 STATIONS —.20

r

.30

180° 150°

.40

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 4 1 o io 5

e 4 5 4 4

,3 5 5 25

2

I.

SOUTH

* 2 4 2 *

1 3 9

1 5

8

1 2

TOTAL

20

20
-98-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 9 6 5 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , y r

-30° 30°

.30

180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 3 8 4 1 e 2

3 .4

12 6 231 3 6

SOUTH

* 5 3 * 1 2 *

1 2

10

5 2

,0

1 2

TOTAL

13

21

17

14
-99-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC 10

AMPLITUDE SCALE (Mc/s)

-30°

118 STATIONS

.20

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 5 10 1 I ° 5 4

2 2

,5 13 7 4,

1 1 8 28

SOUTH

A _§J

1 * 4 1 * 5 2 4

13 3 ' 9

2 3

,2

TOTAL

38

35

24

2 I
-100-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC 10 1 12 STATIONS AMPLITUDE SCALE (Mc/s) p , j

, y r

-30° 30°

.30 .40

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

» 6 2 • 9 7 o 10 6

5

13

21 5 423 9 28

SOUTH

A

6 * 5 3 * _l| 3 4 1 II 3

1 1

1 2

7

TOTAL

37

37
-101-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC 10 AMPLITUDE SCALE (Mc/s)

67 STATIONS

.20

150° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 8 3

o 12 4 ° 3 2

3

,4 6 4 26 2 7

SOUTH

* 2 3 4 2 *

1 4

9

1 2 91 2

TOTAL

29

12

15
-102-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC 10

AMPLITUDE SCALE (Mc/s)

-30°

.10 63 STATIONS

.20 .30 -r T

-60° 60°

90°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V c, 3 » 4 2 e 2 6

13 10 7 23

3 2

7 SOUTH * -4 5 * _ll 2 *

1

i 1 10 5 8

1 2

TOTAL

I 4

26
-103-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC 10 1 1 8 STATIONS AMPLITUDE SCALE (Mc/s) ^ , 12. , £2 r

-30° 30°

-120°

180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 2 4 14 7 ° 7 6

7 5 ,8 5 13 39

7 8 28

SOUTH

A

10 3 * , 2 *

_j\ 1

1 14

1 6

10 4 3 9

TOTAL

35

25

23

35
-lOliAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC 10 116 STATIONS

OO 10 .20 AMPLITUDE SCALE (Mc/s) p , - 1

1 r

-30° 30°

.30

-120 120°

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 8 4 • 10 9 • 6 4

3 4

19 9 10 38

6 1 1 27

SOUTH *

-*l 4 * 3 1 *

-*l

1 3 4

.4 4 4

.2 2 6

TOTAL

33

27

23

33
-105-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 HARMONIC 10 68 STATIONS AMPLITUDE SCALE (Mc/s) °2 , i£ , ^2 r

-30° 30°

.30 .40

-120° 120°

-150° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 2 4 7 6 ° 4 2 5 2

.3

5 7 25

3 2

I,

SOUTH

A

3 5 *

_2j 4

* 1

1 9

2 8

1 2

TOTAL

18 22

15
-106-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC 10 65 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , y r

-30° 30°

.30 T

-120°

-150'

.40

120°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 6 5 o 4 4 2| 1 2 1 14 6 9 23

SOUTH

£

3 * 2 3 *1 7

2 5 2

.0

1 4

10

TOTAL

14

I 7 I 7
-107-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1958 HARMONIC II II8 STATIONS AMPLITUDE SCALE (Mc/s)

-30° 30°

-60c

-90°

-120°

-150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* _sJ 3 18 10 ' 6 6

5 2

15 7 641 9 7 28

SOUTH

A

_!J

2 *

_3J

1 *1 6

7 3

13 2 3 9

2 3

12

TOTAL

34

32

28

24
-108-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1958 HARMONIC II 112 STATIONS AMPLITUDE SCALE (Mc/s) p , i . , £2 r

-30° 30°

.30

-150° 180° 150°

.40

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

v 2 1 • 8 1 1 • 6 7 4 6

.3 8 15 42

7 8 28

SOUTH * '

1 1 3 * 2 2

5 4

II 5 2

.1 2 M 7

TOTAL

20

3 I

25

36
-109-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

MARCH 1954 HARMONIC I I AMPLITUDE SCALE (Mc/s)

67 STATIONS

.20

-120°

-150' 180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

« 5 1 ° 5 2

8 3 1 4 4

14

13 6 26

1 2

7

SOUTH

e>

1 _l| 3 * 1 8

9

2 3 9

1 2

TOTAL

14

29
-110-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

SEPTEMBER 1954 HARMONIC II 6 3 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , y r

-30° 30°

.30

80° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

? 1 3 3 8 » 1 4

5 4

,3 4 8 23 2

7

SOUTH

* 5 2 1 1 *

1 2 1 10 3 3 8

1 2

TOTAL

17

19

16
-111-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1958 HARMONIC II 118 STATIONS AMPLITUDE SCALE (Mc/s) p , ^ , 4^ r

-30° 30°

.30

-60° / * /

/

x* ^

a ° / /

^S. N^/^ • *\t/ -^"

-90°

i n/ • * o \s\

7 o • \

*

1 *» 1

003» o* 1 °

*

V

• 1 A •• * yL

(/"^ A/^. ° v^X ^^ / T^ji— —-^^ \

"V"""" \ '

" j>^\

^/^ \ y\ 120°

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60°

60° TO 90°

NORTH

" 3 1 ° " 12 ° 5 7 8 6

,8 9 7 39

10 6 28

SOUTH ^ J 2 * . 5 *

5 9

14

1 3

10 2 2 9

90°

120°

TOTAL

23

39

32

24
-112-

-120°

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1958 HARMONIC II 116 STATIONS AMPLITUDE SCALE (Mc/s) p , j

, y r

-30° 30°

.30

150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 8 2 10 13 • 7 7 5 4

19 8 7 6 27

SOUTH

* 1 4 3 3

* 4 1 2 7 14 4 2 .2

1 6

TOTAL

33

27

30

26

120°
-113-

AMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

JUNE 1954 HARMONIC I I AMPLITUDE SCALE (Mc/s)

68 STATIONS

.20

-150° 180° 150°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

* 5 5 ° -?J 4 o 2 3 2 1 13 9 4

25

4 2

1,

SOUTH

A _1] 1 * 2 1 *

_ll

3 9 4 1 8

1 2

TOTAL

23

23

14
-llltAMPLITUDE AND PHASE FOR foF2 MONTHLY MEDIAN

DECEMBER 1954 HARMONIC I I AMPLITUDE SCALE (Mc/s)

-30° 30

65 STATIONS

.20

180°

DISTRIBUTION

OF THE

PHASE

LATITUDE 0° TO 30° 30° TO 60° 60° TO 90°

NORTH

V 2 1 «» 5 7 ° 3 9 2

14 2 9 23

1 2 6

SOUTH

A

_e| 2 *

1 6 4

10

1 5 10

1 2

TOTAL

I 2

20

I I 22