分布式卫星的环绕对InSAR测高精度的影响
The Influence of the Rotating of the Cluster Micro-Satellite on Height Measurement of InSAR
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摘要: 分布式卫星SAR系统是最近提出的一种新的SAR系统，该文结合干涉SAR(InSAR)技术，研究了该系统中InSAR成像所面临的问题，分析和推到了系统环绕引起的干涉相位、基线等参数的变化，以及对成像高度精度的影响，给出了相应的数学模型及关系曲线。分析结果表明随着环绕角度的增加，测高误差增大，必须对相位和基线进行合理修正。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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