InSAR测高原理及精度分析

Elevation measurement of InSAR and accuracy analysis

提出了一种改进的InSAR高程模型,建立了高程和干涉相位的直接关系。从InSAR测高的原理出发,利用误差理论知识,分析了测高精度的相关误差源,推导出了测高精度与相位误差、基线长度、基线倾角的关系,并做出了误差传播曲线,得出了彼此之间的影响规律。最后对公式推导中采用的近似处理方法所引入的误差进行了量化分析。

An improved elevation model of InSAR which expresses the direct relationship between height and phase has been developed based on the InSAR elevation model of Currie and Baker.From the principle of InSAR measuring elevation,and using the error theory knowledge,the impact of the relative error sources for elevation precision measurement is systematically analyzed,and the relationship between measurement precision,phase error,baseline length,and baseline inclination is deduced.And error propagation curves are made to show the influence rules of each other.