High-resolution Spaceborne SAR Processing Using the Decomposed Transfer Function

Author
Eldhuset, Knut
Date Issued
2017
Keywords
Syntetisk apertur-radar (SAR)
Matematiske modeller
Dopplereffekt
Permalink
http://hdl.handle.net/20.500.12242/621
https://publications.ffi.no/123456789/621
DOI
10.1109/TAES.2017.2687199
Collection
Articles
Description
Eldhuset, Knut. High-resolution Spaceborne SAR Processing Using the Decomposed Transfer Function. IEEE Transactions on Aerospace and Electronic Systems 2017
1463709.pdf
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Abstract
In this paper a new analytic decomposed transfer function (DTF) for spaceborne SAR (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 a fifth-order (DTF5) algorithm 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=0.3º) for X-band. At higher squint (yaw=7.5º) the DTF5 has to be used to obtain adequate image quality.
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