Effect of ambiguity resolution on the draconitic errors in sub-daily GPS position estimates
Effect of ambiguity resolution on the draconitic errors in sub-daily GPS position estimates
复制标题
模糊度解析对次日 GPS 位置估计中严重误差的影响
DOI：
10.1007/s10291-021-01143-w
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发表时间：
2021-05
期刊：
影响因子：
4.9
通讯作者：
Zhang Di
中科院分区：
文献类型：
--
作者：
Guo Shiwei;Shi Chuang;Wei Na;Li Min;Fan Lei;Zhang Di
在GPS位置时间序列中检测到周期为351.4/N天的伪长轴误差。本研究评估了模糊度解算在亚日常位置估计中减少龙子误差的性能。使用24小时、8小时和4小时的处理会话，生成了覆盖2002年至2017年132个全球台站的精确单点定位解决方案，其中包括模糊度解算和不模糊度解算。采用了欧洲航天局（ESA）和马萨诸塞州理工学院（MIT）的不同卫星产品。虽然模糊度固定率随着处理会话的缩短而降低，但是对于几乎所有的解和分量（除了ESA 4-h解的东分量），通过模糊度解降低了更高百分比的龙形误差。在最好的情况下，固定模糊度减少了超过60%的东组件和约20%的北和上组件的4小时的解决方案的龙形误差。此外，龙形误差和模糊度解决减少显示出纬度依赖性。亚日线解也能减小长轴误差，其中最大的减小幅度为：ESA 4 h解的北、东、上分量分别减小了25.4%、12.6%和25.3%，而MIT解的减小幅度较小。结果表明，部分长轴误差是由于某些未建模的周日和半日信号在标准24小时处理中的混叠造成的，这些信号主要来自轨道相关误差，而不是台站特定误差。
Spurious draconitic errors with periods of (351.4/N) days are detected in GPS position time series. This study assesses the performance of ambiguity resolution in sub-daily position estimates on reducing the draconitic errors. Precise point positioning solutions covering 132 global stations from 2002 to 2017 are generated with and without ambiguity resolution using 24-, 8- and 4-h processing sessions. Different satellite products from the European Space Agency (ESA) and the Massachusetts Institute of Technology (MIT) are employed. Although the ambiguity fixing rate decreases with the processing session shortening, a higher percentage of the draconitic errors are reduced by ambiguity resolution for nearly all the solutions and components (but the East component of ESA 4-h solution). At its best, fixing ambiguities reduces the draconitic errors by more than 60% in the East component and by about 20% in the North and Up components for 4-h solutions. Moreover, the draconitic errors and their reduction by ambiguity resolution show a latitudinal dependence. The draconitic errors are also reduced by sub-daily solutions with the largest reduction of 25.4%, 12.6% and 25.3% in the North, East and Up components, respectively, for ESA 4-h solution with ambiguity resolution, but less reduction for MIT solutions. It indicates that part of the draconitic errors result from the alias of certain unmodeled diurnal and semidiurnal signals beating against standard 24-h processing, and these signals mainly come from orbit-related errors, rather than station-specific errors.
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影响因子：
5.2
作者：
Lagler, K.;Schindelegger, M.;Boehm, J.;Krasna, H.;Nilsson, T.
通讯作者：
Nilsson, T.
影响因子：
4.4
作者：
Ge, M;Gendt, G;Zhang, FP
通讯作者：
Zhang, FP
GPS位置时间序列分析中的Helmert变换策略
影响因子：
2.8
作者：
Guo Shiwei;Shi Chuang;Wei Na;Li Min;Fan Lei;Wang Cheng;Zheng Fu
通讯作者：
Zheng Fu
DOI：
--
发表时间：
1992
期刊：
--
影响因子：
--
作者：
Jiun-Tsong Wu;Sien-Chong Wu;G. Hajj;W. Bertiger;S. Lichten
通讯作者：
Jiun-Tsong Wu;Sien-Chong Wu;G. Hajj;W. Bertiger;S. Lichten
影响因子：
4.4
作者：
Schmid, Ralf;Steigenberger, Peter;Rothacher, Markus
通讯作者：
Rothacher, Markus