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National 2000' GPS control network of China

机译：中国国家2000'GPS控制网

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摘要

An accurately unified national GPS network with more than 2500 stations, named "National 2000' GPS Control Network", signed the epoch 2000. 0, has been established by integrating the existing six nationwide GPS networks of China set up by different departments with different objectives. This paper presents the characteristics of the existing GPS networks, summarizes the strategies in the integrated adjustment of the GPS network, including functional model, stochastic model as well as the adjustment principle modification. By modifying the adjustment strategies according to the characteristics of the existing GPS networks and under the support of the IGS stations, the accuracy of the integrated national GPS network is greatly improved. The datum differences among the sub networks disappear, the systematic error influences are weakened, and the effects of the outliers on the estimated coordinates and their variances are controlled. It is shown that the average standard deviation for the horizontal component is smaller than 1.0 cm, the vertical component is smaller than 2.0 cm, and the three-dimensional (3-D) position of geocenter coordinates is smaller than 3.0 cm. The exterior checking accuracy for the 3-D position is averagely better than 1.0 cm.
机译：通过整合由不同部门，不同目标建立的中国现有的六个全国GPS网络，建立了一个准确统一的，拥有2500多个站点的全国GPS网络，称为“国家2000'GPS控制网络”。 。本文介绍了现有GPS网络的特点，总结了GPS网络集成调整的策略，包括功能模型，随机模型以及调整原理的修改。通过根据现有GPS网络的特点并在IGS站的支持下修改调整策略，可以大大提高集成国家GPS网络的精度。子网络之间的基准差异消失，系统误差影响减弱，离群值对估计坐标及其方差的影响得到控制。结果表明，水平分量的平均标准偏差小于1.0 cm，垂直分量的标准偏差小于2.0 cm，地心坐标的三维（3-D）位置的值小于3.0 cm。 3-D位置的外部检查精度平均优于1.0厘米。

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