基于TIN网的全球选站研究及精密定轨应用

基于不规则三角网（TIN）拓扑关系选站方法，研究卫星精密定轨的精度、效率及测站饱和点的关系。实验表明，在全球布网的条件下，70个跟踪站可完成优于3 cm的精密定轨，且解算效率相比140个跟踪站提升2倍；跟踪站数达到90，精度提升放缓。

Study of Global Station-Selection and Application in Precise Orbit Determination Based on TIN Net

In this paper, a new station selection method is proposed based on the triangulated irregular network(TIN) topology. This method is used to study the precise orbit determination accuracy, efficiency and station saturation point. The experimental data shows that: when under conditions of the global distribution network, 70 stations can succeed in precise orbit determination with precision better than 3 cm, while computational efficiency is increased by 2 times compared to 140 stations. When the number of stations reaches 90, the precision lifting slows. Ensuring orbit determination precision to establish suitable monitoring stations has importance on the global monitoring network construction of the Beidou navigation system.