DocumentCode :
2599694
Title :
Modified phase history model for high resolution spaceborne bistatic SAR
Author :
Ding, Jinshan ; Xing, Mengdao ; Bao, Zheng
Author_Institution :
Xidian Univ., Xian
fYear :
2007
fDate :
5-9 Nov. 2007
Firstpage :
646
Lastpage :
649
Abstract :
Recently bistatic synthetic aperture radar (SAR), especially spaceborne SARs, has attracted the attention of many radar researchers. Generally, the orbit of satellite for remote sensing purposes is an ellipse with small eccentricity, and the earth should be modeled as an ellipsoid. It is well known that a second-order relative motion model can be a good approximation to a monostotic spaceborne SAR. However, for bistatic cases, this phase history model mismatches the real relative motion between a satellite and a rotating earth, dissatisfying the imaging accuracy requirement, and it limits the available azimuth resolution. In order to use the well studied SAR imaging algorithms, we develop a new second-order phase history model for bistatic spaceborne SAR using the phase error fitting method based on the ephemeris data. The new model strengthens the applicability of the conventional second-order phase history model of spaceborne bistatic SAR significantly.
Keywords :
image resolution; radar imaging; remote sensing by radar; spaceborne radar; synthetic aperture radar; SAR imaging algorithm; azimuth resolution; image resolution; monostotic spaceborne SAR; phase error fitting method; remote sensing; second-order phase history model; second-order relative motion model; spaceborne bistatic SAR; synthetic aperture radar; Azimuth; Earth; Ellipsoids; History; Image resolution; Radar remote sensing; Remote sensing; Satellites; Spaceborne radar; Synthetic aperture radar;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Synthetic Aperture Radar, 2007. APSAR 2007. 1st Asian and Pacific Conference on
Conference_Location :
Huangshan
Print_ISBN :
978-1-4244-1188-7
Electronic_ISBN :
978-1-4244-1188-7
Type :
conf
DOI :
10.1109/APSAR.2007.4418695
Filename :
4418695
Link To Document :
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