Title :
Doppler-related focusing aspects in the TOPS imaging mode
Author :
Rodriguez-Cassola, Marc ; Prats-Iraola, Pau ; De Zan, Francesco ; Scheiber, Rolf ; Reigber, Andreas
Author_Institution :
German Aerosp. Center (DLR), Microwaves & Radar Inst., Oberpfaffenhofen, Germany
Abstract :
The distortions caused in conventionally focused TOPS SAR images which originate from the azimuth-variant Doppler centroid within a burst are presented and analyzed. In particular, the azimuth distortions due to topography mismatch in focusing stages and the range distortions due to the assumption of validity for the stop-and-go approximation are expounded in detail. Compensation strategies to accommodate the two effects in an accurate and precise manner are discussed and validated with TOPS data acquired with TerraSAR-X.
Keywords :
Doppler radar; approximation theory; artificial satellites; compensation; data acquisition; distortion; focusing; radar imaging; remote sensing by radar; synthetic aperture radar; TOPS SAR imaging mode; TOPS data acquisition; TerraSAR-X; azimuth distortion; azimuth variant Doppler centroid; burst; compensation strategy; focusing aspects; range distortion; stop-and-go approximation; topography mismatch; Approximation methods; Azimuth; Doppler effect; Focusing; Spaceborne radar; Surfaces; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723212
