CEOS Instrument: Advanced Scatterometer




Instrument:ASCAT
Agencies: EUMETSAT [Primary]
 ESA
Missions: Metop-B
 Metop-C
 Metop-A
Status:Operational
Type:Radar scatterometer
Description:Sea ice cover, sea ice type and wind speed over sea surface measurements. Air pressure over ocean, polar ice contours, ice/snow imagery, soil moisture.
Spatial Resolution: Hi-res mode: 25 - 37 km, Nominal mode: 50 km
Swath Width: Continuous; 2 x 500 km swath width
Wavebands: Microwave: C Band, 5.256 GHz
Technology: Radar scatterometer
Description: Radar with very accurate calibration, to observe an earth’s spot from several directions (ahead, after, aside) and measure differential backscatter coefficients (s0) from sea capillary waves (thus observing surface wind). On land, the s0 are correlated with soil moisture. Two concepts exist: electronic scanning, side looking, exploiting C-band (~ 5 GHz); and conical scanning, exploiting Ku-band (~ 13 GHz). The resolution is typically 25-50 km, the swath 1100-1500 km. Applicable only in LEO.

Measurement List:

(select measurement name to view details)



CEOS Systems Engineering Office (SEO)

CEOS Data Base Version: 17 - Created: 2012-01-18