GPS-DCB对单点定位的影响

发布时间：2018-08-22 09:17

【摘要】：讨论了差分码偏差DCB在非差数据中的存在形式,以及在非差定位中的改正。采用实测数据,详细研究了DCB(C_1-P_1)和DCB(P_1-P_2)对非差定位和解算参数的影响。结果表明,DCB(P__1-P_2)对单频单点定位的影响比较显著,必须进行相应的改正;DCB(C_1-P_1)对非差解算参数的影响包括坐标和接收机钟差两个方面,对坐标的影响来自于DCB(C_1-P_1)的卫星硬件部分,对接收机钟差的影响来自于DCB(C_1-P_1)的接收机硬件部分。分析DCB(C__1-P_1)对模糊度参数的影响,结果表明,DCB(C_1-P_1)改正和不改正时,得到的模糊度参数不一致。当采用无电离层延迟C_1/P_2、L_1/L_2和P_1/P_2、L_1/L_2分别进行精密单点定位数据处理时,对应的模糊度参数也有差异,差异值等于卫星DCB(C_1-P_1)的倍数。
[Abstract]:The existence form of differential code deviation (DCB) in nondifferential data and its correction in nondifferential location are discussed. The influence of DCB (C_1-P_1) and DCB (P_1-P_2) on the nondifferential location and computation parameters is studied in detail by using the measured data. The results show that DCB (P__1-P_2) has a significant effect on single frequency single point positioning. The influence of C_1-P_1 on the parameters of non-differential solution includes coordinate and receiver clock difference. The influence of DCB (C_1-P_1) on the coordinates comes from the satellite hardware part of DCB (C_1-P_1). The influence on receiver clock error comes from the receiver hardware of DCB (C_1-P_1). The effect of DCB (C__1-P_1) on ambiguity parameters is analyzed. The results show that the ambiguity parameters obtained by C_1-P_1 (C_1-P_1) are inconsistent with each other. When the data processing of precise single-point positioning is carried out by using the one-to-one / P2s / L _ S _ 1 / L _ 2 and P _ S _ 1 / P _ 2 / L _ 2 respectively, the corresponding ambiguity parameters are also different, and the difference value is equal to the multiple of the satellite DCB (C_1-P_1).
【作者单位】：上海海洋大学海洋科学学院;海洋测绘应用研究中心;
【基金】：上海市科委项目(140302) 上海海洋大学科技发展专项基金(200068) 中国空间研究院合作项目(158018)~~
【分类号】：P228.4

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