Consistent dynamic satellite reference frames and terres-trial geodetic datum parameters

一致的动态卫星参考系和陆地大地基准参数

基本信息

批准号：
199893089
负责人：
Professor Dr. Urs Hugentobler
金额：
--
依托单位：
Deutsches Geodätisches Forschungsinstitut
依托单位国家：
德国
项目类别：
Research Units
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/199893089?language=en
关键词：
Consistent dynamic satellite reference frames

项目摘要

The aim of the project is the realization of high-precision dynamic reference frames by exploiting the strengths of the available GNSS, SLR and DORIS observations to individual and commonly observed satellites that are characterized by different orbit heights, inclinations and tracking techniques. The focus of the work is the improved realisation of the global geodetic datum as well as on the development of novel concepts for the datum definition of the terrestrial reference frames. Compared to the previous project, in particular low Earth orbiting satellites observed by at least two techniques will be included. These type of satellites act as moving co-location sites and provide observations with very different and changing observation geometries. Thus, combined orbit determination will strengthen the reference frame solution significantly and it is expected that the sensitivity of the solution with respect to the geodetic datum parameters will increase strongly. Complementary simulation studies are performed in order to realize and assess satellite and station configurations which are very sensitive to the datum parameters. Simulations allow it in addition to investigate new orbit and observation types. The contribution of geosynchronous navigation satellites as well as DORIS phase observations and precise inter-satellite ranging links between navigation satellites to the stability of the reference frame will be investigated with extended simulations. The outcomes of the project are epoch and long-term reference frames with a datum realization of the highest accuracy which can be reached today. Furthermore, recommendations will be made, how the datum realization of the terrestrial reference frames can be improved in future by new satellite missions and optimised observing station networks but also by using new observation types.

该项目的目的是通过利用可用的GNSS，SLR和多丽丝观察的强度来实现高精度动态参考框架，以对以不同轨道高度，倾斜度和跟踪技术为特征的个体和通常观察到的卫星。这项工作的重点是改善了全球大地测量基准的实现，以及用于陆地参考框架基准定义的新颖概念的开发。与先前的项目相比，将包括至少两种技术观察到的低地球轨道卫星。这些类型的卫星充当移动的共同位置，并提供具有非常不同和变化的观察几何形状的观测值。因此，组合的轨道测定将显着加强参考帧解决方案，并且预计该解决方案相对于地球基数据参数的敏感性将大大增加。进行互补的仿真研究是为了实现和评估对基准参数非常敏感的卫星和站配置。模拟还允许研究新的轨道和观察类型。地球同步导航卫星以及多丽丝阶段观测值以及导航卫星之间的精确卫星间范围与参考框架稳定性的贡献将通过扩展模拟进行研究。该项目的结果是时期和长期参考框架，并实现了今天可以达到的最高准确性的基准。此外，将提出建议，将来如何通过新的卫星任务和优化观察站网络以及使用新的观察类型来改进地面参考框架的基准实现。