CEOS Instrument: Synthetic Aperture Radar (CSA) C band




Instrument:SAR (RADARSAT-2)
Agency: CSA
Mission: RADARSAT-2
Status:Operational
Type:Imaging radar (SAR)
Description:All-weather images of ocean, ice and land surfaces. Used for monitoring of coastal zones, polar ice, sea ice, sea state, geological features, vegetation and land surface processes
Spatial Resolution: Standard: 27-18 x 25 m (4 looks); Wide: 40-19 x 25 m (4 looks); Fine: 10-7 x 8 m (1 look); ScanSAR (N/W): 80-38 x 60 m / 160-172 x 100 m (4/8 looks); Extended (H/L): 18-16 x 25 m / 60-23 x 25 m (4 looks); Ultra-Fine: 4.6-2.1 x 2.8 m (1 look); Fine Quad-Pol: 14-8 x 8 m (1 look); Standard Quad-Pol: 24-17 x 8 m (1 look); Multi-Look Fine: 10-7 x 8 m (4 looks); Spotlight: 4.6-2.1 x 0.8 m (1 look).
Swath Width: Standard: 100 km (inc.: 20-49deg); Wide: 150 km (inc.: 20-45deg); Fine: 50 km (inc.: 30-50deg); ScanSAR (N/W): 300/500 km (inc.: 20-46 / 20-49deg); Extended (H/L): 75/170 km (inc.: 49-60 / 10-23deg); Ultra-Fine: 20 km (inc.: 20-49deg); Quad-Pol (Standard and Fine): 25 km (inc.: 20-41deg); Multi-Look Fine: 50 km (inc.: 30-50deg). Left- and right-looking capability.
Wavebands: Microwave: C band 5.405 GHz. HH, VV, HV, VH polarization - includes Quad polarization imaging modes.
Technology: Imaging radar (SAR)
Description: If radar is used, the problem of diffraction-limited resolution in MW still applies. In this case, however, by analysing range, azimuth and Doppler effect of the (coherent) signals, synthetic aperture can be implemented, and resolutions typically of 10-30 m can be achieved. Several combinations of polarisations in transmission and reception can be implemented. Resolution can be traded-off with swath (e.g. 30 m / 100 km or 150 m / 400 km). Interferometry between views from different passes enable appreciating changes. SAR exploiting different bands (L, S, C, X) emphasise different features. Applicable only in LEO.

Measurement List:

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CEOS Systems Engineering Office (SEO)

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