Reprocessing of a global GPS network
Reprocessing of a global GPS network
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DOI：
10.1029/2005jb003747
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发表时间：
2006-05
影响因子：
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通讯作者：
P. Steigenberger;M. Rothacher;R. Dietrich;M. Fritsche;A. Rülke;S. Vey
中科院分区：
文献类型：
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作者：
P. Steigenberger;M. Rothacher;R. Dietrich;M. Fritsche;A. Rülke;S. Vey
[1]自1994年全球导航卫星系统国际服务正式启动以来的10年期间，全球定位系统解决方案的处理战略和建模方面取得了相当大的改进。由于这些年来个别IGS分析中心的变化，由此产生的全球大地测量参数时间序列非常不均匀和不一致。因此，对这些长系列进行地球物理解释和实现高精度全球参考框架是困难和有问题的。鉴于这些不足之处，慕尼黑和德累斯顿技术大学决定在过去十年中共同对全球全球定位系统网络进行再处理。对11年数据进行再处理的初步结果表明，估计参数的质量和均匀性有了显著改善，将能够进行新的地球动力学和地球物理解释。在最初的几年里，可以实现坐标重复性的提高超过2倍。亚日地球自转参数的形式误差可减少30%。对先进的建模方法进行了测试，如基于数值天气模型的映射功能，考虑到二阶和三阶电离层校正以及接收器和卫星的绝对天线相位中心校正，以实现进一步的改进。
[1] During the 10 years since the official start of the International GNSS Service (IGS) in 1994 considerable improvements in the processing strategies and modeling of global GPS solutions were achieved. Owing to changes at the individual IGS Analysis Centers during these years the resulting time series of global geodetic parameters are very inhomogeneous and inconsistent. A geophysical interpretation of these long series and the realization of a high-accuracy global reference frame are therefore difficult and questionable. In view of these deficiencies, the Technical Universities of Munich and Dresden decided to perform a reprocessing of a global GPS network over the last decade in a joint effort. First results of the reprocessing of 11 years of data show significant improvements in the quality and homogeneity of the estimated parameters and will allow for new geodynamic and geophysical interpretations. In the early years an improvement of the coordinate repeatability by a factor of more than 2 could be achieved. The formal errors of subdaily Earth rotation parameters could be reduced by 30%. Advanced modeling approaches like a mapping function based on numerical weather models, consideration of second- and third-order ionospheric corrections and absolute antenna phase center corrections for receivers and satellites were tested to achieve further improvements.