短基线GPS控制网双差整周模糊度的直接解算方法

短基线GPS控制网双差整周模糊的直接解算方法(DC,D irect Calcu lation算法)可以避开"周跳的探测与修复"和"整周模糊度的搜索固定",是一种新的整周模糊度解算方法。在基线坐标满足一定条件的情况下,可以保证解算的L1,-1和L-3,4双差整周模糊度的浮点解与整数解之间的偏差小于0.5周,由浮点解直接四舍五入,进而可以直接解算L1双差整周模糊度。本文用自编软件解算了实测数据,验证了本文方法的实用性,并可获得与商用软件TGO精度相当的基线。

Direct Calculation of Double Difference Ambiguity in GPS Short Baseline Control Network

A new integer ambiguity method(DC,Direct Calculation) is suitable to double difference ambiguity in GPS short baseline control network,which can avoid detection and repair cycle slips.When the proximate baseline vector reaches a certain condition,the influence of and double difference ambiguity is less than 0.5cycl.So,integer ambiguity can be gotten by directly rounding the float ambiguity.This paper processes actual surveying data using independently developed software,the following conclusions can be drown: the principle of DC algorithm is useful;Using DC algorithm can get the same precision baseline with commercial software TGO.