编队飞行InSAR的平地效应与地形高度效应分析

在编队飞行条件下,推导了InSAR干涉相位特性与平地之间的关系以及相位特性与地形高度之间的关系,定量分析了平地效应对相位的影响以及地形高度对相位的影响.平地与地形高度二者共同影响了InSAR信号的相位,因此相位表达式可以写成二个偏导数的和的形式.以圆锥体为例仿真了地面场景,在不同视角,不同雷达波长,不同基线长度的条件下做了仿真,仿真实验的结果与理论分析的结果一致.

Flat Earth Effect and Terrain Height Effect in Formation Flying InSAR

Under the condition of formation flying, the relation between InSAR phase characteristic and flat earth, was deduced as well as the relation between phase characteristic and terrain height.The influence of flat earth and terrain height to phase was thoroughly analyzed.Flat earth and terrain height have common effect on InSAR phase.Thus the phase can be written in the form of sum of 2 partial derivatives.An example of cone was given as simulated real terrain.Simulation of different look angle, different radar wavelength and different baseline length was performed.The simulated result was in accordance with theoretical analysis result.