In this paper, a new analytic decomposed transfer function (DTF) for spaceborne synthetic aperture radar processing is calculated using the stationary phase approximation and Taylor's series expansion. The DTF copes with large Doppler centroid variations and executes range cell migration correction, secondary range compression, azimuth compression, and higher order effects. A fourth-order (DTF4) and fifth-order (DTF5) algorithms have been implemented using segmented block processing. It is shown that the DTF4 yields high quality 3-look target responses at azimuth resolution 0.3 m and range resolution 0.5 m at low squint (yaw = 0.3°) for X-band. At higher squint (yaw = 7.5°) the DTF5 has to be used to obtain adequate image quality.
High-Resolution Spaceborne SAR Processing Using the Decomposed Transfer Function
IEEE Transactions on Aerospace and Electronic Systems ; 53 , 5 ; 2187-2198
01.10.2017
519009 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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