主星帶編隊(duì)小衛(wèi)星順軌干涉GMTI及性能分析
ATI-GMTI of Spaceborne Parasitic Radar System
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摘要: 該文針對(duì)主星帶編隊(duì)小衛(wèi)星雷達(dá)系統(tǒng)，討論了基于修正的順軌干涉(ATI)原理進(jìn)行地面動(dòng)目標(biāo)檢測方法及其性能。利用小面單元模型仿真了一幅帶動(dòng)目標(biāo)的地面起伏場景圖像，驗(yàn)證了該方法的有效性。綜合盲速、最小可檢測速度、測速誤差等指標(biāo)，給出了適合執(zhí)行ATI功能的編隊(duì)構(gòu)形部分參數(shù)，可為編隊(duì)小衛(wèi)星GMTI相對(duì)繞飛軌道設(shè)計(jì)提供一定指導(dǎo)。最后，對(duì)CartWheel和Pendulum兩種典型系統(tǒng)構(gòu)形進(jìn)行了GMTI性能仿真分析。
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關(guān)鍵詞:
- 編隊(duì)小衛(wèi)星;順軌干涉;地面動(dòng)目標(biāo)檢測
Abstract: In this paper, the ground moving target indication based on modified along-track interferometry of spaceborne parasitic radar system is analyzed. The imaging simulation of a piece of fluctuant terrain with a moving target verifies the validity. The appropriate formation fling parameters are presented when considering some performance metrics, such as the blind velocity, the minimum detectable velocity and the velocity precision. Some conclusions are serviceable of orbital design. Finally, GMTI performance of two typical systems, Cartwheel and Pendulum, is analyzed through computer simulation. -
陳筠力. 單發(fā)多收分布式SAR衛(wèi)星系統(tǒng)初步概念研究. 分布式航天器新概念及其應(yīng)用技術(shù)研討會(huì). 北京，2004，10: 308-314.[2]Massonnet D. The interferometric cartwheel: A constellation of passive satellites to produce radar images to be coherently combined[J].Int. J. Remote Sensing.2001, 22(12):2413-2430[3]Fiedler H, Krieger G, Jochim F, Kirschner M, Moreira A. Analysis of bistatic configurations for spaceborne SAR interferometry. EUSAR Cologne, Germany, 2002: 29-33.[4]Goldstein R M, Zebker H A. Interferometric radar measurement of ocean surface currents[J].Nature.1987, 328(20):707-709[5]Moccia A. Spaceborne Along_track SAR interferometry: Performance analysis and mission scenarios. IEEE Trans. on AES, 2001, 37(1): 199-213.[6]何峰，梁甸農(nóng)，劉建平. 星載寄生式SAR多普勒特性分析. 信號(hào)處理，2004, 20(5): 475-480.[7]劉建平，梁甸農(nóng)，何峰. 主星帶伴隨小衛(wèi)星編隊(duì)系統(tǒng)的順軌干涉SAR性能研究. 電子與信息學(xué)報(bào), 2004, 26(增): 500-506[8]Gierull C H. Statistical analysis of multilook SAR interferograms for CFAR detection of ground moving targets[J].IEEE Trans. on Geosciences and Remote Sensing.2004, 42(4):691-701 -
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