Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1998-02-17
1999-07-13
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
342194, 342196, G01S 1390
Patent
active
059232790
ABSTRACT:
A method of correcting an object-dependent spectral shift in radar interferograms has two main procedures. In the first, the phase of the interferogram is reconstructed through phase unwrapping and subsequently smoothed for reducing noise. In the second, the two complex-value radar images intended for forming the interferogram are suitably multiplied by a factor derived from the smoothed phase, and are subsequently low-pass-filtered. The spectral shift dependent on the local inclination of the terrain is thus adaptively corrected and the decorrelation caused by the image geometry is extensively eliminated. Particularly in the region of critical, mountainous terrain, the phase noise drops to a very low level.
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Bamler Richard
Davidson Gordon
Deutsches Zentrum fur Luft-und Raumfahrt e.V.
Sotomayor John B.
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