Strengthening the GNSS based kinematic positioning of low Earth orbiters for gravity field determination (B03)

加强基于 GNSS 的低地球轨道飞行器运动学定位以确定重力场（B03）

• 批准号: 260770240
• 金额: --
• 依托单位: Institut für Erdmessung
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/260770240?language=en
• 关键词: Strengthening; GNSS; based; kinematic; positioning

Within the first funding period, B03 investigated new approaches for kinematic orbit determination of low Earth orbiter satellites based on simulated and real GPS data. The first focus was on the concept of receiver clock modelling, which lead to an improved 3D RMS of 29 % for real data analysis. The second topic is the virtual receiver, which combines data from multiple GNSS antennas and strengthens the observation geometry for the radial component by 43 %. This concept will be further investigated in the second funding period. In addition, the direct velocity estimation based on GPS Doppler observations and its impact on gravity field recovery will be studied in detail.

在第一个资助期内，B03研究了基于模拟和真实GPS数据的低地球轨道卫星运动学轨道确定的新方法。第一个重点是接收器时钟建模的概念，这使得实际数据分析的3D RMS提高了29%。第二个主题是虚拟接收器，它结合了来自多个GNSS天线的数据，并将径向分量的观测几何增强了43%。这一概念将在第二个筹资期进一步研究。此外，还详细研究了基于GPS多普勒观测的直接速度估计及其对重力场恢复的影响。