GPS精密单点定位收敛性分析及改善措施

Convergence Analysis and Improvement Methods in GPS Precise Point Position

目前卫星定位技术中常用的高精度定位方法主要是相对定位和非差相位精密单点定位。非差相位精密单点定位无法像相对定位那样使用差分方式来消除定位中的某些误差,因而如何对影响定位的各个误差源进行准确地建模修正是提高非差相位精密单点定位精度和收敛速度的关键。本文从非差相位精密单点定位的3个关键环节入手,对影响定位收敛速度的因素进行简要分析,讨论了改善措施,并结合实际数据进行了相关验证。

Satellite positioning technologies commonly used in precision positioning methods are relative positioning and precise point positioning using un-differenced carrier phase.Precise point positioning using un-differenced carrier phase can not eliminate errors like relative positioning using the differential positioning.Therefore,accurate modeling of various error sources in precise point position using un-differenced carrier phase is an important means to improve the positioning accuracy and convergence speed.Factors affecting convergence speed are analyzed in this paper from three key aspects of precise point positioning.Improvement measures are also discussed and the measures are validated with actual data.