分布式星載干涉SAR中空間基線的分析和設(shè)計(jì)
Baseline analysis and design for distributed spaceborne interferometric SAR
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摘要: 分布式星載干涉SAR可以同時(shí)實(shí)現(xiàn)三維地形成像、洋流成像和提高空間分辨率等3種SAR于涉成像。其系統(tǒng)基線設(shè)計(jì)需要同時(shí)考慮這3種SAR干涉成像對基線的不同要求，所以比較復(fù)雜。該文在給出分布式小衛(wèi)星被動穩(wěn)定編隊(duì)飛行的空間構(gòu)形和3種SAR干涉成像對系統(tǒng)基線要求的基礎(chǔ)上，提出了分布式星載干涉SAR基線設(shè)計(jì)中存在著3個(gè)制約關(guān)系；給出了協(xié)調(diào)這3個(gè)制約關(guān)系的一種設(shè)計(jì)準(zhǔn)則，并在此準(zhǔn)則下對一個(gè)L波段的分布式星載干涉SAR進(jìn)行了系統(tǒng)基線設(shè)計(jì)。
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關(guān)鍵詞:
- 分布式; 星載SAR; 干涉; 基線; 設(shè)計(jì)
Abstract: Distributed Spaceborne Interferometric SAR(DSI-SAR) can be explored to imple-ment three possibilities of the coherent combination of SAR, images, which are DEM, ocean current imaging and improving resolution in range and azimuth. So the baseline design for DSI-SAR is more complicated than that for INSAR. In this paper, formation flying of small satellites and geometry of DSI-SAR, are discussed and the requirements of three SAR coherent combinations for baselines are analyzed. Furthermore, three performance trade-offs in DSI-SAR baseline design are presented. According to these trade-offs, a method to design baseline is given and applied to an L-band DSI-SAR. -
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