JEM/SMILES
L2 Products Guide
STRUCTURE OF STANDARD SMILES L2 PRODUCTS
Draft 1.2

April 16, 2010

JEM/SMILES L2 Products Guide

1. STANDARD LEVEL 2 PRODUCTS OVERVIEW(1)FILE NAME

The file name is defined as follows.
SMILES_L2_{product_name}_{band_name}_{version_name}_{date}.he5(2)

A COMBINATION OF PRODUCT_NAME AND BAND_NAME

The combination of a product_name and band_name are as follows.
No.

product_nameband_name

1O3

O3-sym-17

O3-asym-18

HCl

CH3CNHOClA

HNO323O3O3-sym-17

O3-asym-18

HCl

O3

O3-asym-17O3-asym-18

HNO3BCClO(3) VERSION_NAME
version_name is represented as follows.
xxx-yy-zzzz :xxx

: Level 1 B version

yy: Climatological DB versionzzzz: Level 2 Algorithm version(4) DATE
date is represented as follows.
yyyymmdd :(ex. 20091009)

yyyy: Observation year

mm: Observation month

dd: Observation day

1

JEM/SMILES L2 Products Guide

2. PRODUCT FORMAT
1) STRUCTURE OF HDF5-EOS DATA FILES
We show below the format structure of the HDF5*-EOS data file.
No.

Filed

Attributes1FileAttribute

File Level Attributes:
・Instrument Name・Processing Level・Version・Observation day・Band name・Scan number
・L1B file name2

GeolocationField

Geolocation Field Attributes:
・Observation point・Time・Altitude
・Solar Zenith Angle
・Azimuth View
・Ascending/Descending flag

3

Data Field

Data Field Attributes:
・Data value
・Estimate error
・Status*: HTTP://WWW.HDFGROUP.ORG/

2

JEM/SMILES L2 Products Guide2) STRUCTURE OF STANDARD SMILES L2 PRODUCTS● Standard processing data (HDF5-EOS)
Structure of standard processing data is as follows.
<File Attributes>
No.

HDF-EOS5 Name

Explanation

Dimension

Data type

Byte

1 L1BID

L1B file name(nTimes)char

20*nTimes

2 InstrumentName

Instrument Name (SMILES)

-char

6

3 ProcessLevel

Processing level (L2)

-

char

2

-

char

23

-

char

23

Start time in this file
4 StartUTC(yyyy-mm-ddT00:00:00.000)
End time in this file
5 EndUTC(yyyy-mm-ddT23:59:59.000)
6 GranuleMonth

Month(mm)-int

4

7 GranuleDayDay(dd)

-int

4

8 GranuleDayofYear

Granule Day of Year

-

int

4

9 GranuleYear

Year(yyyy)-int4

10 PGEVersion

Processing version(XXX-XX-XXXX)-char

1111 StartScan

Scan count of first day in this file-char

612 EndScan

Scan count of end day in this file-char

613 BandNameBand name-char

4Total107+20*nTimes<Swath Attributes>
No.

HDF-EOS5 Name
1 Altitude

Explanation

Dimension

Data type

Unit

Calculation Altitude(nLevels)

floatkm-char

Byte
4*nLevels

vertical coordinate
2 VerticalCoordinate

8

system name
Total

8+4*nLevels

3JEM/SMILES L2 Products Guide<Geolocation/Data fields Attributes>: Next information is added to each field item.
No.

HDF-EOS5 Name

Explanation

Dimension

Data type

Byte

1 MissingValue

Missing value- float42 Title

Filed name- char30

3 Units

Unit- char

12

4 UniqueFieldDefinition

Filed Definition- char20

Total66<Geolocation Fields>
No.

HDF-EOS5 Name
1 Time2 TimeUTC

Explanation
Observation time
(Total second since 1/1/1958)
Observation time（UTC）
yyyy-mm-dd hh:mm:ss.sss

Dimension

Data type Unit(nTimes)

double(nTimes)

Byte＊18*nTimeschar-23*nTimes

3 AltitudeRepresentative altitude(nLevel)

float

km

4*nLevel

4 Latitude

Observation Latitude(nTimes)float

degrees

4*nTimes

5 Longitude

Observation Longitude(nTimes)float

degrees

4*nTimes

6 SolarZenithAngle

Solar Zenith Angle(nTimes)float

degrees

4*nTimes

7 LocalTime

Local time (hh:mm:ss)(nTimes)char-

8*nTimes

8 LineOfSightAngle

Azimuth View

(nTimes)float

degrees

4*nTimes

9 AscendingDescending

Ascending/Descending flag(nTimes)char-

1*nTimes

Total

56*nTimes+4*nLevel*1: seconds since 1958-1-1

4

JEM/SMILES L2 Products Guide<Data Fields>
No.

HDF-EOS5 Name

Explanation

Dimension

DataUnit

Byte

type
1 L2Value(nLevel,nTim

Value

4*nTimes*nfloatvmres)Level(nLevel,nTim
2 L2Precisioncalculation error

4*nTimes*nfloatvmres)
MeasurementError

Measurement error

Level(nLevel,nTim

34*nTimes*nfloatvmres)
SmoothingError

Smoothing Error

Level(nLevel,nTim

44*nTimes*nfloatvmres)
AprioriA priori value

Level(nLevel,nTim

54*nTimes*nfloatvmres)
AprioriError

A priori error

Level(nLevel,nTim

64*nTimes*nfloatvmres)
CorrLength
7

Correlative length of A(nTimes)

prioriAveragingKernel

Level

Averaging Kernel

float

km

float

-

(nLevel,nLev

8

4*nTimes*nel,nTimes)
VerticalResolution

Vertical Resolution

Level＾2(nLevel,nTim

9

4*nTimes

4*nTimes*nfloatkmes)
InformationValue

Information Value

Level(nLevel,nTim

10

4*nTimes*nfloat-es)
Pressure
11

pressure

WaterVapor

Baseline0

Baseline0Precision

line

Baseline1

Levelof (nLevel,nTim
float

line

4*nTimes*nerror

Levelof (nLevel,nTim
float

km-1

4*nTimes*nes)

Levelprimary coefficient of (nLevel,nTim

Basekm-1es)

floatContinuum
Baseline1Precisionvmres)

CoefficientBase

4*nTimes*nfloat

coefficient

15

Level

Using Water Vapor of (nLevel,nTim

Continuum

14

4*nTimes*nhPaes)

retrieval

13of (nLevel,nTim
float

retrieval

1216

Using

Level

Hz-1.km-1

4*nTimes*nes)error

primary coefficientLevelof (nLevel,nTim
float

Hz-1.km-1

4*nTimes*nes)

Level

5JEM/SMILES L2 Products GuideNo.

HDF-EOS5 Name

Explanation

DataDimension

Unit

Byte

type
Baseline2
17coefficient

2ndof (nLevel,nTim

Continuum
Baseline2Precision

18
Baseline3

Baseline3Precision

RadianceResidualMax

coefficient

RadianceResidualMean

RadianceResidualRMS

RetrievedAltitudeOffsetErr

4*nTimes*nes)

Level
Hz-3.km-1 4*nTimes*nBase line error of 3rd (nLevel,nTim
floates)

Max.

Level

Radiance

Mean(nTimes)

float

K

4*nTimes(nTimes)float

K

4*nTimes(nTimes)float

K

4*nTimes(nTimes)

float

km

4*nTimes(nTimes)

float

km

4*nTimes(nTimes)int-

4*nTimes(nTimes)int-

4*nTimes(nTimes)char-

36*nTimes(nTimes)int-

4*nTimes

Radiance

RMS

Radiance

Residual

24 RetrievedAltitudeOffset

Hz-3.km-1

float

Residual

23

Levelof (nLevel,nTim

Residual

22

4*nTimes*nes)

coefficient21Hz-2.km-1

floatContinuum

20

Level

Base line error of 2nd (nLevel,nTim

3rd

4*nTimes*nes)

coefficient19Hz-2.km-1

float

Altitude Offset
Altitude Offset error

25orNumIterPerform
26

Convergence

numberand result
MaxNumIteration

27Max.

convergence

numberL1BFlg28
29 Status

QualityflagofL1Bdata
Status information
Total

4*nTimes*nLevel＾2+72*nTimes*nLevel+72*nTimes<StructMetadata>
No. HDF-EOS5 Name
1 StructMetadata.0

Explanation
Matrix information of swath data

Dimension Byte
132000< coremetadata >No. HDF-EOS5 Name
1 coremetadata.0

Explanation
HDF-EOS information

Dimension Byte
16974

6