Analysis of Baseline in Spaceborne InSAR System

Abstract

Based on principle of spatial image system by interferometric synthetic aperture radar (InSAR), height error is discussed. The relation between signal-to-noise ratio (SNR), range resolution and baseline design are analyzed. The optimal baseline expression is derived from the relationship between variance and baseline based on target height. The simulation results coincide with the baseline of the system in practice. The derived optimal baseline expression is of significance to optimized design of performance of spaceborne InSAR system.