ASAR External Characterisation

Details ASAR External Characterisation ASAR External Characterisation

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.526e..10z&link_type=abstract

Proceedings of CEOS Working Group on Calibration / Validation - SAR WORKSHOP (ESA SP-526). 24-26 September 2002, London, United

Physics

Scientific paper

External characterisation is required to quantify the properties of the passive part of the antenna and the calibration network. The EC factor is derived from the difference of transmit cw pulses recorded simultaneously on-board and on the ground by a coherent receiver. Any roll mispointing can by determined from a residual linear phase trend between on-board and on-ground recording. Consistent results have been found for three different measurements in vertical polarization. As EC factors are close to 1 they have little impact on the elevation gain reconstruction.

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