流动站与参考站不同采样率GPS数据处理新方法

Extended DUFCOM of Ambiguity Resolution for Single Epoch GPS Positioning Solution Analysis

摘要: 针对动态GPS相对定位时流动站与参考站采用不同采样率的情况,提出了在全部同步历元先行平差的基础上,将流动站上每两个最近同步历元之间的非同步数据作为一个数据段单独处理,以相邻历元相位差分值作为观测量,整体平差段内所有非同步历元流动站坐标的分段平差方法。该方法顾及了历元间差分定位所带来的相关性,有效地改善了历元间差分定位误差累积效应。算例表明,新方法更为严密可靠,并提高了流动站定位精度。

Abstract: The ambiguity resolution theory of GPS L 1 phase observation using single epoch data based on DUFCOM was analyzed, the extended DUFCOM was developed. A new single epoch ambiguity fixing method was proposed for GPS L 2, L n and L w. The property of the extended method was given, f urthermore, and the efficiency of ambiguity resolution and the accuracy of positioning solution for the above four phase observations were compared in theo-ry and result.