短基线GPS控制网双差整周模糊度的直接解算方法  

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

作　　者：廖远琴[1] 邱蕾[2] 

机构地区：[1]上海市地质调查研究院,200072 [2]武汉大学测绘学院,430079

出　　处：《上海地质》2008年第4期2-6,共5页

摘　　要：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。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 base line with commercial software TGO.

关 键 词：短基线GPS控制网 整周模糊度 DC算法伪距双差 

分 类 号：P228.4[天文地球—大地测量学与测量工程] V249.122.2[天文地球—测绘科学与技术]