星载GPS实时定轨中重力场模型阶次的最优确定方法
发布时间:2019-05-15 00:42
【摘要】:分析重力场模型的截断误差及其影响因素,并用多颗不同轨道高度的低轨卫星GPS实测数据进行实时定轨仿真分析,提出实时定轨精度能够达到1.0m(伪距法实时定轨)和0.5m(相位法实时定轨)的重力场模型阶次的最优确定方法。使用CHAMP和TerraSAR-X 2颗卫星实测数据,验证了重力场模型阶次的最优确定方法的可行性和有效性。该方法不仅避免了传统经验法确定重力场模型阶次不准确的问题,而且不需要借助精密轨道进行精度评估,便于实时定轨系统的工程应用。
[Abstract]:The truncation error of gravity field model and its influencing factors are analyzed, and the real-time orbit determination simulation analysis is carried out with the measured data of several Leo satellites with different orbital heights. An optimal method for determining the order of gravity field model with real-time orbit determination accuracy of 1.0m (pseudo-range real-time orbit determination) and 0.5m (phase method real-time orbit determination) is proposed. The feasibility and effectiveness of the optimal method for determining the order of gravity field model are verified by using the measured data of CHAMP and TerraSAR-X. This method not only avoids the problem that the traditional empirical method is not accurate in determining the order of gravity field model, but also does not need the precision evaluation of precision orbit, which is convenient for the engineering application of real-time orbit determination system.
【作者单位】: 武汉大学测绘学院;地球空间信息技术协同创新中心;
【基金】:国家自然科学基金(41374035)~~
【分类号】:P228.4
[Abstract]:The truncation error of gravity field model and its influencing factors are analyzed, and the real-time orbit determination simulation analysis is carried out with the measured data of several Leo satellites with different orbital heights. An optimal method for determining the order of gravity field model with real-time orbit determination accuracy of 1.0m (pseudo-range real-time orbit determination) and 0.5m (phase method real-time orbit determination) is proposed. The feasibility and effectiveness of the optimal method for determining the order of gravity field model are verified by using the measured data of CHAMP and TerraSAR-X. This method not only avoids the problem that the traditional empirical method is not accurate in determining the order of gravity field model, but also does not need the precision evaluation of precision orbit, which is convenient for the engineering application of real-time orbit determination system.
【作者单位】: 武汉大学测绘学院;地球空间信息技术协同创新中心;
【基金】:国家自然科学基金(41374035)~~
【分类号】:P228.4
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