实际入射角的相位干涉仪测角方法

为了提高短距离定位精度，消除采用平行入射假定所引入的计算误差，分析和研究了近似误差对角度估计和解相位模糊的影响；得出了满足平行入射近似的前提条件，为干涉仪的波长、基线长度等参数设计提供了指导依据；提出了实际入射角的相位差估计和相应的角度计算方法，提高了角度估计精度。文章提出的高精度相位干涉仪测角方法，适用于多个运动平台（如卫星、飞行器）的互相定位、航天器交会对接、地面短距离目标定位等测角精度要求高的工程应用。

Phase Interferometer Method for the Actual Angle-measure

To improve the positioning precision for short distance and to eliminate the calculation error caused by adopting the assumption of parallel incidence,the effects of approximate error on angle estimation and phase unwrapping ambiguity were analyzed.And the prerequisite for satisfying the approximation of parallel incidence was obtained.Furthermore,the method for the phase difference estimation of the actual incident angle and the relevant angle calculation was proposed,and the angle estimation precision could be improved.This angle detecting method with high precision by using phase interferometer is suitable for engineering applications with high requirement for precision,such as reciprocal positioning of multiple motion platforms,the rendezvous and docking for the spacecraft,short range object positioning on ground.