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IASI Products  

IASI products are classified according to CEOS list.
 

Level 0 :Raw IASI measurement data, after on-ground demultiplexing ; level 0 includes pre-calibrated spectra, the corresponding non calibrated images, calibration images, verification data and auxiliary data necessary for further processing.
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PRODUCTS
IASI Products  
EPS Products  
Level 1a :Non apodised calibrated spectra and corresponding images ; this step of processing comprises data decoding, radiometric post-calibration, spectral calibration, IASI/AVHRR coregistration via IASI images, geolocation and dating.
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Level 1b :Level 1a resampled.
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Level 1c :Level 1b apodised to obtain a nominal Instrument Spectral Response Function ; this level includes also an analysis of the AVHRR radiances over the IASI pixels.
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Level 2a :Geophysical products derived from IASI in a self-standing mode (profiles of temperature, humidity, surface temperature, trace gas distribution, cloud parameters, etc.). Level 2a data may exist as interim geophysical products during the commissioning and pre-operational IASI mission phases and as geophysical products after upgrading of the processing software at the end of the pre-operational phase. Some of them might be merged into a more limited number of geophysical product records depending on the processing architecture and needs of users.
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Level 2b :Geophysical products derived after co-processing of data from IASI and the METOP meteorological instruments. These products may be similar to level 2a products but with higher accuracy, resolution and/or extracted over a wider range of cloudiness.
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Level 3 :Gridded and time-averaged geophysical products derived from level 2b products possibly in combination with information obtained from sources other than EPS system.
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Level 4 :Multisensor geophysical products for instance as results of assimilation in meteorological or chemical transport models.
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EPS Products  
Hereafter are described EUMETSAT Polar System products and instruments for their derivation in stand-alone or synergetic modes.
 

 
PRODUCTS
IASI Products  
EPS Products  
Product IASI HIRS AMSU-A
MHS		 AVHRR
temperature profile X X X
relative humidity profiles X X X
cloud cover X X X X
cloud liquid water content

X
cloud top temperature X X X X
cloud characterisation X X X X
total precipitable water X X X
precipitation index

X
sea surface temperature X X
X
land surface temperature X

X
ozone total column X X

ozone profiles X


trace gas total column X


aerosol amount X

X
air mass determination X X X
vegetation index


X
sea ice

X
snow detection X X X X
surface albedo


X
outgoing long-wave radiation X X
X
planetary albedo


X
downward long-wave flux X X

clear sky flux X X
X
air/sea heat flux X X
X
cooling rate profiles X X
X

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