IASI_MDR_L1A_v4

binary record "IASI_MDR_L1A_v4"size: 2365310
(format version 4)

idfield namedefinition
0RECORD_HEADER
binary record "REC_HEAD"size: 20
1DEGRADED_INST_MDR
binary uint8size: 1
Quality of MDR has been degraded from nominal due to an instrument degradation
2DEGRADED_PROC_MDR
binary uint8size: 1
Quality of MDR has been degraded from nominal due to a processing degradation
3GEPSIasiMode
binary record "IASI_GEPSIasiMode"size: 4
4GEPSOPSProcessingMode
binary record "IASI_L1_GEPSOPSProcessingMode"size: 4
5GEPSIdConf
binary record "IASI_L1_GEPSIdConf"size: 32
6GEPSLocIasiAvhrr_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_integersize: 5
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
7GEPSLocIasiAvhrr_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_integersize: 5
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
8OBT
binary array[30]size: 180
On Board Time (Coarse time + Fine time)
binary bytessize: 6
On Board time counter (coarse time + fine time)
9OnboardUTC
binary array[30]size: 180
Date of IASI measure (on board UTC)
binary timesize: 6
unit: "s since 2000-01-01"

value: float(./days) * 86400 + float(./milliseconds) / 1000
binary recordsize: 6
EPS short cds

idfield namedefinition
0days
binary uint16size: 2
days since January 1st, 2000 (must be positive)

unit: "days since 2000-01-01"
1milliseconds
binary uint32size: 4
milliseconds since start of day

unit: "1e-3 s"
10GEPSDatIasi
binary array[30]size: 180
Date of IASI measure (Corrected UTC)
binary timesize: 6
unit: "s since 2000-01-01"

value: float(./days) * 86400 + float(./milliseconds) / 1000
binary recordsize: 6
EPS short cds

idfield namedefinition
0days
binary uint16size: 2
days since January 1st, 2000 (must be positive)

unit: "days since 2000-01-01"
1milliseconds
binary uint32size: 4
milliseconds since start of day

unit: "1e-3 s"
11GIsfLinOrigin
binary array[2]size: 8
Zero point in line in the interpolation grid of the spectral database
binary int32size: 4
12GIsfColOrigin
binary array[2]size: 8
Zero point in column in the interpolation grid of the spectral database
binary int32size: 4
13GIsfPds1
binary array[2]size: 8
Weight of interpolation point 1
binary int32 (double)size: 4
converted unit: "" (multiply by 1/1000000)
14GIsfPds2
binary array[2]size: 8
Weight of interpolation point 2
binary int32 (double)size: 4
converted unit: "" (multiply by 1/1000000)
15GIsfPds3
binary array[2]size: 8
Weight of interpolation point 3
binary int32 (double)size: 4
converted unit: "" (multiply by 1/1000000)
16GIsfPds4
binary array[2]size: 8
Weight of interpolation point 4
binary int32 (double)size: 4
converted unit: "" (multiply by 1/1000000)
17GEPS_CCD
binary array[30]size: 30
Corner Cube Direction for all observational targets
binary uint8size: 1
18GEPS_SP
binary array[30]size: 120
Scan position for all observational targets
binary int32size: 4
19GIrcImage
binary array[30, 64, 64]size: 245760
Calibrated IASI images
binary uint16size: 2
unit: "W/(m2.sr.1/m)"
20GQisFlagQual
binary array[30, 4]size: 120
Quality flag for the system
binary uint8size: 1
21GQisQualIndex
binary vsf_integersize: 5
System-IASI general quality index
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
22GQisQualIndexIIS
binary vsf_integersize: 5
IIS imager quality index inside 1c product
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
23GQisQualIndexLoc
binary vsf_integersize: 5
Geometric quality index for sounder product
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
24GQisQualIndexRad
binary vsf_integersize: 5
Radiometric quality index for sounder product
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
25GQisQualIndexSpect
binary vsf_integersize: 5
Spectral quality index for sounder product
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
26GQisSysTecIISQual
binary uint32size: 4
System -TEC quality index for IIS
27GQisSysTecSondQual
binary uint32size: 4
System -TEC quality index for sounder
28GGeoSondLoc
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)
29GGeoSondAnglesMETOP
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)
30GGeoIISAnglesMETOP
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)
31GGeoSondAnglesSUN
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)
32GGeoIISAnglesSUN
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)
33GGeoIISLoc
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)
34EARTH_SATELLITE_DISTANCE
binary uint32size: 4
Distance of satellite from Earth centre

unit: "m"
35IDefSpectrDWn
binary vsf_integersize: 5
Sample width of IASI spectra

unit: "1/m"
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer
36IDefNsfirst
binary int32size: 4
Number of the first sample of IASI spectra
37IDefNslast
binary int32size: 4
Number of the last sample of IASI spectra
38GSmcSpect
binary array[30, 4, 8700]size: 2088000
Level 1a spectra
binary int16size: 2
unit: "W/(m2.sr.1/m)"
39IDefCovarMatEigenVal1b
binary array[100, 2]size: 1000
Level 1a noise variance-covariance matrix index. (IDefCovarMatEigenVal1b is the same for Level 1a and 1b.)
binary vsf_integersize: 5
binary recordsize: 5
Variable Scale Factor Integer

idfield namedefinition
0scale_factor
binary int8size: 1
scale factor
1value
binary int32size: 4
32-bit integer