摘要
高精度GNSS定位需要解算双差模糊度值,经典最小二乘求解的模糊度一般为浮点解,浮点解丢失了模糊度的整数性,不利于提高未知参数的精度。本文讨论了LAMBDA方法的原理及其算法,对模糊度整数变换前后LAMBDA方法的执行结果进行了比较,讨论了联合去相关法和迭代法两种整数Z变换算法的基本原理,对LAMBDA整周模糊度解算方法中的两种整数Z变换算法进行了比较。结果表明LAMBDA方法模糊度效率较高,联合去相关法的处理成功率高于迭代法。
High-precision GNSS positioning requires the calculation of double-difference ambiguity values,the ambiguity of classical least squares solution is generally floating point solution,floating point solutions lose the ambiguity of the integer,is not conducive to improving the accuracy of unknown parameters.This paper discusses the principle and algorithm of LAMBDA method,the results of the implementation of LAMBDA method before and after the integer transform of ambiguity are compared,and the basic principles of the two integer Z transform algorithms are discussed,the LAMBDA integer ambiguity two integer Z transform algorithm and computational methods are compared.The results show that the ambiguity of LAMBDA method is more efficient,and the processing success rate of united ambiguity decorrelation method is higher than iterative method.
作者
徐琦
杨艳玲
李宏力
XU Qi;YANG Yanling;LI Hongli(The First Surveying and Mapping Engineering Institute of Heilongjiang,Harbin 150025,China)
出处
《测绘与空间地理信息》
2019年第2期162-165,共4页
Geomatics & Spatial Information Technology
