Title :
Relationship between antenna pointing stability and spaceborne ScanSAR scalloping calibration
Author_Institution :
Beijing Jiaotong Univ., Beijing
Abstract :
Based on uniform weighting antenna model, the Doppler center frequency error from instability of antenna pointing is derived in detail for spaceborne scanning synthetic aperture radar (ScanSAR) system. And the effects of Doppler center frequency error on image radiometric correction are analyzed. The basic precision of the antenna pointing stability is present for the offsets of ScanSAR image radiometric correction, which is verified by simulations.
Keywords :
Doppler effect; geophysical signal processing; geophysical techniques; radiometry; remote sensing by radar; satellite antennas; spaceborne radar; synthetic aperture radar; Doppler center frequency error; antenna pointing stability; image radiometric correction; spaceborne ScanSAR scalloping calibration; spaceborne scanning synthetic aperture radar system; uniform weighting antenna model; Aperture antennas; Azimuth; Calibration; Doppler radar; Frequency; Radar antennas; Radiometry; Signal processing; Spaceborne radar; Stability; Doppler centroid frequency; radar; radiometric correction; stability;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
DOI :
10.1109/IGARSS.2007.4422836
