IASI_MDR_L1C_v4

binary record ""

size: 2727768

(format version 4)

field name

definition

RECORD_HEADER

binary record "REC_HEAD"	size: 20

DEGRADED_INST_MDR

binary uint8	size: 1
Quality of MDR has been degraded from nominal due to an instrument degradation

DEGRADED_PROC_MDR

binary uint8	size: 1
Quality of MDR has been degraded from nominal due to a processing degradation

GEPSIasiMode

binary record "IASI_GEPSIasiMode"	size: 4

GEPSOPSProcessingMode

binary record "IASI_L1_GEPSOPSProcessingMode"	size: 4

GEPSIdConf

binary record "IASI_L1_GEPSIdConf"	size: 32

GEPSLocIasiAvhrr_IASI

binary array[30, 4, 2]

size: 1200

Measure positioning relatively to AVHRR: position of 4 IASI sounder pixels in AVHRR raster with last dimension equal to 2 corresponding to (line, column)

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GEPSLocIasiAvhrr_IIS

binary array[30, 25, 2]

size: 7500

Measure positioning relatively to AVHRR: position of IIS pixels for a subgrid 5*5 of IIS with last dimension equal to 2 corresponding to (line, column)

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

OBT

binary array[30]

size: 180

On Board Time (Coarse time + Fine time)

binary bytes size: 6

On Board time counter (coarse time + fine time)

OnboardUTC

binary array[30]

size: 180

Date of IASI measure (on board UTC)

binary time size: 6

unit: "s since 2000-01-01"

value: float(./days) * 86400 + float(./milliseconds) / 1000

binary record size: 6

EPS short cds

id field name definition

0 days

binary uint16 size: 2

days since January 1st, 2000 (must be positive)

unit: "days since 2000-01-01"

1 milliseconds

binary uint32 size: 4

milliseconds since start of day

unit: "1e-3 s"

GEPSDatIasi

binary array[30]

size: 180

Date of IASI measure (Corrected UTC)

binary time size: 6

unit: "s since 2000-01-01"

value: float(./days) * 86400 + float(./milliseconds) / 1000

binary record size: 6

EPS short cds

id field name definition

0 days

binary uint16 size: 2

days since January 1st, 2000 (must be positive)

unit: "days since 2000-01-01"

1 milliseconds

binary uint32 size: 4

milliseconds since start of day

unit: "1e-3 s"

GIsfLinOrigin

binary array[2]

size: 8

Zero point in line in the interpolation grid of the spectral database

binary int32 size: 4

GIsfColOrigin

binary array[2]

size: 8

Zero point in column in the interpolation grid of the spectral database

binary int32 size: 4

GIsfPds1

binary array[2]

size: 8

Weight of interpolation point 1

binary int32 (double) size: 4

converted unit: "" (multiply by 1/1000000)

GIsfPds2

binary array[2]

size: 8

Weight of interpolation point 2

binary int32 (double) size: 4

converted unit: "" (multiply by 1/1000000)

GIsfPds3

binary array[2]

size: 8

Weight of interpolation point 3

binary int32 (double) size: 4

converted unit: "" (multiply by 1/1000000)

GIsfPds4

binary array[2]

size: 8

Weight of interpolation point 4

binary int32 (double) size: 4

converted unit: "" (multiply by 1/1000000)

GEPS_CCD

binary array[30]

size: 30

Corner Cube Direction for all observational targets

binary uint8 size: 1

GEPS_SP

binary array[30]

size: 120

Scan position for all observational targets

binary int32 size: 4

GIrcImage

binary array[30, 64, 64]

size: 245760

Calibrated IASI images

binary uint16 size: 2

unit: "W/(m2.sr.1/m)"

GQisFlagQual

binary array[30, 4]

size: 120

Quality flag for the system

binary uint8 size: 1

GQisQualIndex

binary vsf_integer

size: 5

System-IASI general quality index

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GQisQualIndexIIS

binary vsf_integer

size: 5

IIS imager quality index inside 1c [product

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GQisQualIndexLoc

binary vsf_integer

size: 5

Geometric quality index for sounder product

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GQisQualIndexRad

binary vsf_integer

size: 5

Radiometric quality index for sounder product

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GQisQualIndexSpect

binary vsf_integer

size: 5

Spectral quality index for sounder product

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GQisSysTecIISQual

binary uint32	size: 4
System -TEC quality index for IIS

GQisSysTecSondQual

binary uint32	size: 4
System -TEC quality index for sounder

GGeoSondLoc

binary array[30, 4, 2]

size: 960

Location of pixel centre in geodetic coordinates (long, lat) for each sounder pixel

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GGeoSondAnglesMETOP

binary array[30, 4, 2]

size: 960

Measurement angles for each sounder pixel (zenith, azimuth)

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GGeoIISAnglesMETOP

binary array[30, 25, 2]

size: 6000

Measurement angles for a subgrid of IASI imager (zenith, azimuth)

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GGeoSondAnglesSUN

binary array[30, 4, 2]

size: 960

Solar angles at the surface for each sounder pixel (zenith, azimuth)

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GGeoIISAnglesSUN

binary array[30, 25, 2]

size: 6000

Solar angles at the surface for a subgrid (5x5) of IASI imager (zenith, azimuth)

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GGeoIISLoc

binary array[30, 25, 2]

size: 6000

Location of pixel centre in geodetic coordinates for a sub grid (5x5) of the imager pixels

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

EARTH_SATELLITE_DISTANCE

binary uint32	size: 4
Distance of satellite from Earth centre unit: "m"

IDefSpectDWn1b

binary vsf_integer

size: 5

Sample width of IASI 1C spectra (same as 1B)

unit: "1/m"

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

IDefNsfirst1b

binary int32	size: 4
Number of the first sample of IASI 1C spectra (same as 1B)

IDefNslast1b

binary int32	size: 4
Number of the last sample of IASI 1C spectra (same as 1B)

GS1cSpect

binary array[30, 4, 8700]

size: 2088000

Level 1C spectra

binary int16 size: 2

unit: "W/(m2.sr.1/m)"

IDefCovarMatEigenVal1c

binary array[100, 2]

size: 1000

Level 1c noise variance-covariance matrix index

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

IDefCcsChannelId

binary array[6]

size: 24

Radiance Analysis: Identification of the AVHRR channel or pseudo-channels used for Radiance Analysis

binary int32 size: 4

GCcsRadAnalNbClass

binary array[30, 4]

size: 480

Radiance Analysis: Number of identified classes in the sounder FOV

binary int32 size: 4

GCcsRadAnalWgt

binary array[30, 4, 7]

size: 4200

Radiance Analysis: sounder FOV Radiance Analysis (% covered by each class)

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GCcsRadAnalY

binary array[30, 4, 7]

size: 3360

Radiance Analysis: Y Angular position of the centre of gravity

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GCcsRadAnalZ

binary array[30, 4, 7]

size: 3360

Radiance Analysis: Z Angular position of the centre of gravity

binary int32 (double) size: 4

unit: "1e-6 degrees"

converted unit: "degrees" (multiply by 1/1000000)

GCcsRadAnalMean

binary array[30, 4, 7, 6]

size: 25200

Radiance Analysis: Mean AVHRR radiances (all channels) of the sounder FOV classes

binary vsf_integer size: 5

unit: "W/(m2.sr.1/m)"

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GCcsRadAnalStd

binary array[30, 4, 7, 6]

size: 25200

Radiance Analysis: Standard deviation AVHRR radiances (all channels) of the sounder FOV classes

binary vsf_integer size: 5

unit: "W/(m2.sr.1/m)"

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GCcsImageClassified

binary array[30, 100, 100]

size: 300000

Radiance Analysis: Image AVHRR or IIS classified

binary uint8 size: 1

IDefCcsMode

binary record

size: 4

Radiance Analysis: Image used is from AVHRR or IIS imager (degraded cases)

field name

definition

spare_1

binary bytes	size: 3:7
not used

hidden: true

ImgRadAnal

binary uint8	size: 0:1
Image used for radiance analysis; 0 = AVHRR, 1 = IIS

GCcsImageClassifiedNbLin

binary array[30]

size: 60

Radiance Analysis: Number of usefull lines

binary int16 size: 2

GCcsImageClassifiedNbCol

binary array[30]

size: 60

Radiance Analysis: Number of usefull columns

binary int16 size: 2

GCcsImageClassifiedFirstLin

binary array[30]

size: 150

First line of the classified image (number in the Avhrr raster)

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GCcsImageClassifiedFirstCol

binary array[30]

size: 150

First column of the classified image (number in the Avhrr raster)

binary vsf_integer size: 5

binary record size: 5

Variable Scale Factor Integer

id field name definition

0 scale_factor

binary int8 size: 1

scale factor

1 value

binary int32 size: 4

32-bit integer

GCcsRadAnalType

binary array[30, 7]

size: 210

Radiance Analysis: boolean reporting if classes are of extreme type

binary uint8 size: 1