A subaperture imaging approach of spaceborne spotlight SAR

Wang Guodong; Zhou Yinqing; Li Chunsheng

Volume 25 Issue 1

Jan. 2003

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Wang Guodong, Zhou Yinqing, Li Chunsheng. A subaperture imaging approach of spaceborne spotlight SAR[J]. Journal of Electronics & Information Technology, 2003, 25(1): 9-16.

Citation:

Wang Guodong, Zhou Yinqing, Li Chunsheng. A subaperture imaging approach of spaceborne spotlight SAR[J]. Journal of Electronics & Information Technology, 2003, 25(1): 9-16.

Wang Guodong, Zhou Yinqing, Li Chunsheng. A subaperture imaging approach of spaceborne spotlight SAR[J]. Journal of Electronics & Information Technology, 2003, 25(1): 9-16.

Citation:

Wang Guodong, Zhou Yinqing, Li Chunsheng. A subaperture imaging approach of spaceborne spotlight SAR[J]. Journal of Electronics & Information Technology, 2003, 25(1): 9-16.

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A subaperture imaging approach of spaceborne spotlight SAR

Received Date: 2001-07-22
Rev Recd Date: 2001-11-25
Publish Date: 2003-01-19

Abstract

Abstract

Signal properties of spaceborne spotlight SAR. arc; discussed. Based on the analyses of a few .spotlight imaging algorithm, a modified chirp scaling algorithm for spaceborne spotlight SAR is proposed. Besides, a subaperture method is combined with the algorithm. In order to resolve high Pulse Repetition Frequency (PR.F) and the time-variant of Doppler center frequency, etc., the necessity and implementation approach of the subaperture method are analyzed thoroughly. The validity of the proposed method is tested by computer simulation.

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References(1)

References

W.G. Carrara, R. S. Goodman, R. M. Majewski, Spotlight Synthetic Aperture Radar, Boston,Artech House, 1995, 5-9.[2]黄岩,李春升,陈杰,周荫清,高分辨星载SAR改进Chirp Scaling成像算法,电子学报,2000,28(3),35-38.[3]G.W. Davidson, I. Cumming, Signal properties of spaceborne squint-mode SAR, IEEE Trans.on Geosci. Remote Sensing, 1997, 35(3), 611-617.[4]C. Prati, F. Rocca, Focusing SAR data with time-varying Doppler centroid, IEEE Trans. on Geosci. Remote Sensing, 1992, 30(3), 550 559.[5]Tat Soon Yeo, Ngee Leng Tan, Cheng Bo Zhang, Yi Hui Lu, A new subaperture approach to high squint SAR processing, IEEE Trans. on Geosci. Remote Sensing, 2001, 39(5), 954-968.[6]黄岩,高分辨率星载合成孔径雷达成象处理技术研究,[博士论文],北京航空航天大学,1999,第5章.[7]J. Mitternayer, A. Moreira, O. Loffeld, Spotlight SAR data proces sing using the frequency scaling algorit hm, IEEE Trans. on Geosci. Remote Sensing, 1999, 37(5), 2198-2214.

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