BDS短基线单历元差分定位算法

摘要

Aiming at the serious ill-posed problem of double-difference equations in BDS short baseline single epoch differential positioning,we use the TIKHONOV regularization criterion to improve the ill-posed problem,and then obtain the reliable floating point solution and its corresponding variance covariance matrix.The partial ambiguity fixed strategy,using the LAMBDA method to obtain an accurate fixed solution,is then applied to achieve centimeter results in BDS real-time positioning.%针对BDS短基线单历元差分定位中双差法方程严重病态的问题,采用TIKHONOV正则化准则进行改善.计算获得可靠的浮点解及其对应的方差协方差阵,再运用部分模糊度固定策略,采用LAMBDA方法进行模糊度固定获取准确的固定解,达到cm级的BDS实时定位效果.