分布式小卫星SAR系统的模糊性分析

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Ambiguity analysis of the distributed micro-satellites SAR system

YI Yu-sheng;LIU Xin;LIU Nan;ZHANG Lin-rang

(Key Lab. of Radar Signal Processing, Xidian Univ., Xi′an 710071， China)

Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-01-20
Contact: YI Yu-sheng E-mail:yiyusheng@163.com

Abstract

Abstract: A calculational method for ambiguities of long base-line distributed micro-satellites synthetic aperture radar system is proposed. The precision position of ambiguity dots is derived from micro-satellites’ real orbit information and the geometry of distributed micro-satellites. And the formulas are given to calculate both the range ambiguity ratio and azimuth ambiguity ratio, followed by the simulation analysis of the ambiguities of the Cartwheel formation and the Pendulum formation, which shows the ambiguity property of the distributed micro-satellites SAR System. The results of the simulation analysis indicate that the range ambiguities of micro-satellites will get close to that of the chief satellite as the decrease in distance between chief satellite and micro-satellites, and that the azimuth ambiguities of micro-satellites almost remain constant.

Key words: distributed micro-satellites, ambiguity, SAR

CLC Number:

TN957.51

YI Yu-sheng;LIU Xin;LIU Nan;ZHANG Lin-rang. Ambiguity analysis of the distributed micro-satellites SAR system
[J].J4, 2008, 35(1): 22-26.

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Ambiguity analysis of the distributed micro-satellites SAR system

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