DocumentCode :
1498650
Title :
Processing the Azimuth-Variant Bistatic SAR Data by Using Monostatic Imaging Algorithms Based on Two-Dimensional Principle of Stationary Phase
Author :
Wang, Ruiqi ; Yun Kai Deng ; Loffeld, Otmar ; Nies, Holger ; Walterscheid, I. ; Espeter, T. ; Klare, Jens ; Ender, Joachim H. G.
Author_Institution :
Space Microwave Remote Sensing Syst. Dept., Chinese Acad. of Sci., Beijing, China
Volume :
49
Issue :
10
fYear :
2011
Firstpage :
3504
Lastpage :
3520
Abstract :
This paper presents a new bistatic point target reference spectrum. It is derived by using the 2-D principle of stationary phase which is first applied in the synthetic aperture radar (SAR) community. The spectrum contains two hyperbolic range-azimuth coupling terms and thus is very similar to the monostatic spectrum. It shows the characteristic of the conventional monostatic SAR besides an additional azimuth scaling term. Therefore, it makes the common Doppler-based monostatic processing algorithms readily suitable to handle the Bistatic SAR (BiSAR) data in the moderate-squint azimuth-variant configurations with two moving platforms. Based on the spectrum, two Doppler-based monostatic imaging algorithms [i.e., range-Doppler algorithm (RDA) and chirp-scaling algorithm (CSA)] are readily implemented to deal with the moderate-squint azimuth-variant BiSAR data. Compared to the processing procedure for the monostatic SAR, the RDA and CSA for the BiSAR need only the adjustment of Doppler parameters. Finally, the potential and limitation of the spectrum are analyzed, and the real raw data in the spaceborne/airborne configurations are used to validate the proposed spectrum and processing methods.
Keywords :
airborne radar; radar imaging; spaceborne radar; synthetic aperture radar; 2D principle of stationary phase; Doppler-based monostatic processing algorithms; azimuth-variant bistatic SAR data; bistatic point target reference spectrum; chirp-scaling algorithm; hyperbolic range-azimuth coupling terms; moderate-squint azimuth-variant configurations; monostatic imaging algorithms; range-Doppler algorithm; spaceborne-airborne configurations; synthetic aperture radar community; Azimuth; Couplings; Doppler effect; Imaging; Receivers; Strontium; Transmitters; 2-D principle of stationary phase (2DPSP); Bistatic point target reference spectrum (BPTRS); bistatic synthetic aperture radar (SAR) (BiSAR); chirp-scaling algorithm (CSA);
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.2011.2129573
Filename :
5752846
Link To Document :
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