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相位误差对InSAR相对测高精度影响

Keywords: 干涉合成孔径雷达,相位误差,相对测高精度

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Abstract:

为研究InSAR系统相对测高精度的变化规律,从InSAR系统高程测量的原理出发,给出了相位误差对相对测高精度影响的分析方法,并详细分析了信噪比、体散射、时间去相干等非理想因素对相位误差的影响.对不同波段星载InSAR系统,采用该方法进行了相对测高精度随下视角变化的理论分析,得出在短波长固定基线条件下存在使相对测高精度最优的下视角,并通过计算仿真验证了该最优下视角的存在.该方法和结论有助于星载InSAR系统的参数设计和性能分析.

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