In spaceborne SAR systems, the radar beam pointing angle must be knwon to approximately one half the beamwidth in order to resolve the Doppler centroid ambiguity and provide accurate data processing. This constraint may place a heavy burden on the beam pointing and measurement error budget, unless an alternate means can be provided to estimate the beam pointing angle or Doppler centroid. In this paper, a new method is presented for estimating the Doppler centroid directly from the received radar data, durig the image formation process. The algorithm has been programmed into the GSAR processor, and encouraging test results have been obtained.
Resolving the Doppler ambiguity for spaceborne synthetic aperture radar
Trennung der Doppler-Mehrdeutigkeit fuer Syntetik-Apertur-Radaranlagen fuer den Weltraum
1986
5 Seiten, 6 Bilder, 5 Quellen
Conference paper
English
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