Abstract
Since the first activation of JERS-1's Synthetic Aperture Radar (SAR) on beginning of April 1992, calibration efforts for NASDA's SAR products are being conducted by using calibration instruments with known signal intensities and locations, such as 2.4 meter trihedral corner reflectors and active radar calibrators. Data analysis result shows that the conversion factor from Digital Number (DN) of SAR product to Normalized Radar Cross Section (NRCS) of the target is constant over full image swath and is determined as -68.51 dB with the accuracy of ±1.86 dB (1 sigma) and its long term stablity is within ±1.8 dB. The image quality evaluation conducted in parallel also shows that the image quality is as good as designed.
