Relative height accuracy analysis of TanDEM-X system
TanDEM-X系统相对测高性能分析

According to TanDEM-X satellite program, this paper studies interferometric capabilities of TanDEM-X mission during an orbit period and tries to get the change of relative height error in a global scope. Firstly, based on HILL-equation of the helix formation, effective baseline, including the range and azimuth effective baseline, whichhas a great impacton interferometry is analyzed in detail during an orbit period. Then the influence of baseline decorrelation imposing on interferometric phase error is discussed detailedly, which is themost important influence on relative height error. At lastrelative heightmodel is established and relative heighterrororTanDEM-X system is presented further. The computer simulating result shows the validity ofanalysi