分布式衛(wèi)星的環(huán)繞對InSAR測高精度的影響
The Influence of the Rotating of the Cluster Micro-Satellite on Height Measurement of InSAR
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摘要: 分布式衛(wèi)星SAR系統(tǒng)是最近提出的一種新的SAR系統(tǒng)，該文結(jié)合干涉SAR(InSAR)技術(shù)，研究了該系統(tǒng)中InSAR成像所面臨的問題，分析和推到了系統(tǒng)環(huán)繞引起的干涉相位、基線等參數(shù)的變化，以及對成像高度精度的影響，給出了相應(yīng)的數(shù)學(xué)模型及關(guān)系曲線。分析結(jié)果表明隨著環(huán)繞角度的增加，測高誤差增大，必須對相位和基線進行合理修正。
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關(guān)鍵詞:
- 分布式衛(wèi)星系統(tǒng); 合成孔徑雷達; 干涉相位; 有效基線; 成像精度
Abstract: The cluster micro-satellite Synthetic Aperture Radar(SAR) system is an inno-vative SAR system brought forward recently. In the cluster micro-satellite system, tech-nology of cross-track interferometic SAR imaging processing is studied. The influence of the rotating of the cluster micro-satellite on the baseline and the interferometric phase is analyzed. The corrected formula of the baseline and the interferometric phase are derived. By computer simulation, the errors between corrected and uncorrected height measurement are compared. The analysis results verify the correction of the formula and the necessity to correct the baseline and the phase. -
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