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一种短基线DGPS定位中初始化整周模糊度的新方法(英文) 被引量:2

A New Method for Initializing Carrier Phase Ambiguities in Short Baseline DGPS Surveying
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摘要 研究GPS载波相位动态定位中的整周模糊度初始化问题 ,提出一种新的初始化整周模糊度方法。新方法适用于传统的“交换天线法”的应用场合。相比于传统的交换天线法 ,新方法将天线复位次数从两次减低到一次 ,且在天线复位过程中允许发生周跳 ,因而操作更简单也更容易 ,并且能得到可靠的结果。传统的交换天线法需要有 2个观测条件 (卫星可视性等 )良好的天线放置点 ,并在这 2个天线放置点上进行交换天线操作。为方便起见 ,这 2个天线放置点通常是相距较近的 (比如相距 10米以内[1] )。在提出的新方法中 ,需要有 3个类似的天线放置点 (A ,B ,C) ,为操作方便和控制所得结果的可靠性 ,也要求这 3个点相互距离较近。这是新方法与交换天线法的共同之处。新方法分为 3个操作步骤。第 1步 :将 2台拟用于差分定位的GPS接收机 (分别以 1#和 2 #表示 )分别放置在点位A和点位B ,进行若干历元的观测 ,得到载波相位双差观测值 φpqAB(t1) ,其中t1表示时标 ,上标中的 p ,q分别表示基准GPS卫星和非基准GPS卫星。第二步 :将 2 #接收机的天线从点位B移动到点位C ,在历元t2 进行观测 ,得到双差观测值 φpqAC(t2 ) ;在这一步操作中 ,需注意避免发生载波相位周跳。第 3步 :将 1#接收机的天线从点位A复位到点位B ,进行 In short baseline DGPS surveying,when the two GPS antennas can be closely placed,the 'Antenna Swapping' method is commonly used to initialize the carrier phase ambiguities. In this paper,a new method is proposed to replace this traditional method. Comparing with the traditional one, the new method is much more convenient in operation and can provide reliable results.
出处 《测绘学报》 EI CSCD 北大核心 2003年第1期20-25,共6页 Acta Geodaetica et Cartographica Sinica
基金 ThisresearchissupportedbytheNationalNatureScienceFoundation ( 4 960 40 61 497840 0 2 499740 3 9)
关键词 DGPS RTK 交换天线法 整周模糊度 全球定位系统 周跳 DGPS RTK antenna swapping method ambiguity
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参考文献3

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同被引文献19

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