CEOS EO HANDBOOK – INSTRUMENT SUMMARY
- IRS
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Full Name
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Infra-Red Sounder
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Status
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Being developed
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Instrument Agencies
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EUMETSAT , ESA
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Maturity
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Instrument Type
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Atmospheric temperature and humidity sounders 
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Geometry
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Earth disk scanning
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Instrument Technology
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Medium-resolution IR spectrometer
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Sampling
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Sounding
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Data Access
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Open Access
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Data Format
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NetCDF, BUFR
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Measurements and Applications
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Measurements of vertically resolved clear sky atmospheric motion vectors, temperature and water vapour profiles.
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Resolution Summary
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Horizontal: 4 km at SSP, Vertical: 1 km
[Best Resolution: 4000m]
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Swath Summary
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640 x 640 km dwells, step and stare, moving alternatley E-W and W-E moving up S-N one dwell step at the end of each row of dwells. Each disc is divided in 4 areas of Local Area Coverage (LAC).
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Accuracy Summary
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clear sky AMVs: 2 m/s, temperature profile: 1 K, water vapour profile: 5%
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Waveband Summary
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Band 2: 700 - 1210 cm^-1 (8.3 - 14.3 µm), Band 1: 1600 - 2175 cm^-1 (4.6 - 6 µm)
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| MWIR (~3.0 µm - ~6.0 µm) |
| TIR (~6.0 µm - ~15.0 µm) |
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Instrument Measurements
Measurements Overview
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| Category | Parameter |
| Atmospheric Humidity Fields | Atmospheric specific humidity (LT, HT, LS, HS&M, TC)   |
| Atmospheric Temperature Fields | Atmospheric temperature (LT, HT, LS) |
| Atmospheric stability index |
| Atmospheric Winds | Wind profile (vertical) |
| Cloud type, amount and cloud top temperature | Cloud cover |
| Cloud top temperature |
| Ozone | O3 Mole Fraction |
| Radiation budget | Upwelling (Outgoing) spectral radiance at TOA |
| Surface temperature (land) | Land surface temperature |
| Surface temperature (ocean) | Sea surface temperature |
| Trace gases (excluding ozone) | HNO3 (LT, HT, LS, TC) |
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Instrument Missions
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