CEOS Instrument: TOPEX NASA Radar Altimeter

Agency: NASA
Mission: Topex-Poseidon
Status:No longer operational
Type:Radar altimeter
Description:Measurement of global ocean surface topography
Spatial Resolution: N/A
Swath Width: 6 km
Wavebands: Microwave: 126 GHz and 5.3 GHz
Technology: Radar altimeter
Description: Nadir-viewing radar for very accurate ranging measurement between satellite and surface. The spread of echoes provides information on significant wave height, the intensity on the wind speed, the multi-temporal analysis the ocean dynamic topography and the geoid. The instantaneous field of view is ~ 25 km and moves along track. The radar altimeter operates in Ku-band (~ 13 GHz) with the support of C-band (~ 5 GHz) for correction from ionospheric rotation; and is associated to a nadir-pointing MW radiometer for water vapour correction. Applicable only in LEO.

Measurement List:

  Ocean dynamic topography

(select measurement name to view details)

CEOS Systems Engineering Office (SEO)

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