应用约束条件快速解算整周模糊度  

Fast Ambiguity Resolution Using Constraint Factors

作　　者：段志勇[1] 袁信[1] 

机构地区：[1]南京航空航天大学自动控制系南京,210016

出　　处：《南京航空航天大学学报》2000年第1期38-42,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：GPS载波相位测量用于解算载体的航向和姿态时必需解决的问题之一就是整周模糊度的确定。近年来提出了多种模糊度的解算方法 ,但对 GPS航姿系统来说 ,若能利用固有的约束条件则会使模糊度问题变得简单且快速有效。在详细分析了几种约束条件的基础上 ,文中探讨了如何合理利用这些约束条件来减小模糊度的搜索范围 ,以加快模糊度的解算速度 ,并对检验方法作了改进。The integer ambiguity resolution is one of the important problems in heading and attitude determination using GPS carrier phase measurements. Many methods to resolve the integer ambiguity have been proposed in the last decade. For GPS heading and attitude system, the ambiguity resolution is efficient,fast and simple if using the existence constraint factors. In order to enhance the speed of ambiguity resolution, this paper discusses the logical usage of these factors to limit the range within which the integer ambiguity must be searched. As using baseline length and visible satellite geometrical relationship based on user′s position, the number of integer ambiguity must be searched to decrease to less than 1 000 for 4.6 m baseline. This paper presents the improved validation methods. The simulational results prove that the method is efficient and can resolve the integer ambiguity within 2~3 min.

关 键 词：GPS 载波相位测量 约束条件 仿真 整周模糊度 

分 类 号：P228[天文地球—大地测量学与测量工程] TN967.1[天文地球—测绘科学与技术]