一种基于时间-矢量模型的InSAR测高分析方法

针对编队飞行InSAR卫星系统状态参数所具有的"时变性"、"立体性"特征,提出了一种基于时间—矢量分析的InSAR测高模型,开发了计算仿真程序。对单个飞行周期内地面目标的绝对高程精度与系统状态参数之间的关系进行了详细分析。由于地面绝对高程信息重建基于矢量分析,提出了使用矩阵表示系统状态参数误差传播系数的分析方法,分析揭示出随着编队飞行卫星轨道构形的不断变化所导致的绝对高程精度的变化规律。分析结果为系统关键技术分解提供了理论依据。

New Method Derived from Time-Vector Analysis for Generation of Elevation Information Based on Interferometric SAR Satellites

In consideration of Time-varying and Three-dimensional characteristics of the formation flying InSAR satellites system parameters,a new method derived from time-vector analysis for generation of elevation information was presented.The calculation and simulation programs were also developed.The relations between the ground targets' absolute altitude and system parameters in a single flight period were analyzed in detail.As a result of vector resolution,an analytical method using matrixes to indicate system parameters' error propagation coefficients was established.The analysis of variation regularity of the ground target absolute altitude,followed with the continuous alteration of the formation flying satellite relative orbital configuration,was carried out by putting the processing module of the system parameter error propagation coefficients matrixes into the time-vector analysis model.The results provide theoretical foundation for system key techniques extraction.