SIR-C/X-SAR data calibration and ground truth campaign over the NASA-CB1 test-site

During the Space Shuttle Endeavour mission in October 1994, a remote-sensin g campaign was carried out with the objectives of both radiometric and pola rimetric calibration and ground truth data acquisition of bare soils. This paper presents the results obtained in the experiment. Polarimetric cross-t alk and channel imbalance values, as well as radiometric calibration parame ters, have been found to be within the science requirements for SAR images. Regarding ground truth measurements, a wide spread in the height rms value s and correlation lengths has been observed, which has motivated a critical revisiting of surface parameters descriptors.