卫星高度角对GPS测量精度的影响研究

Effects of Satellites Elevation on GPS Positioning Precision

首先利用TEQC软件对实验数据进行预处理和质量检查,然后从卫星可见性、卫星截止高度角和观测时间3个方面研究了GPS数据处理中不同卫星截止高度角对GPS测量精度的影响,对卫星截止高度角的选取进行了讨论。通过某大型水利枢纽的实际算例,说明卫星截止高度角应根据卫星可见状况、观测模式以及观测时间等因素来选取。

GPS measurement accuracy could be affected by many factors.In this paper,we focused on GPS satellite cut-off elevation angle on the impact of GPS measurement.After pre-processing and quality inspection by TEQC,experimental data were processed from satellite visibility,satellite cut-off elevation angle and the length of the observation duration aspects to research and ensure an optimal cut-off elevation angle.Actual data of some water projects were further studied and it was found that the appropriate satellite cut-off elevation angle should be selected based on the status of observation,such as observation mode,visibility and observation time etc.,so there is a need for further study on the satellite cut-off elevation angle selection criteria under various conditions.