Tianhui-1C卫星数据质量分析及精密定轨

发布时间：2018-04-01 02:26

本文选题：精密定轨　切入点：双频GPS　出处：《大地测量与地球动力学》2017年09期

【摘要】：对Tianhui-1C卫星的星载双频GPS数据进行质量分析,利用伪随机脉冲方法进行简化动力学定轨,采用重叠弧段比较法对其精密定轨精度进行初步分析,并从理论上分析星载GPS接收机由单频改为双频对测图精度的影响。实验表明,Tianhui-1C卫星的星载GPS观测数据完整率优于80%,周跳比优于47,L1频点的多路径误差约0.22m,L2频点的多路径误差约0.23m,LC组合观测值的验后残差RMS优于9.7mm。采用轨道重叠弧段比较法对两个时段共48h的星载GPS数据进行精密定轨精度比较,三维精度优于3.65cm。定轨精度的提高,可使无地面点控制条件下等高线间距(CI)精度提高3.866m,高程误差提高1.171m。
[Abstract]:The quality analysis of Tianhui-1C satellite dual-frequency GPS data is carried out, the pseudo-random pulse method is used to simplify the dynamic orbit determination, and the overlap arc comparison method is used to analyze the precision of orbit determination.The influence of spaceborne GPS receiver from single frequency to dual frequency on mapping accuracy is analyzed theoretically.The experimental results show that the complete rate of spaceborne GPS observation data of Tianhui-1C satellite is better than that of 80mm, and the multipath error of the multipath error of 0.22mL2 frequency is 0.22mL2 and the residual error RMS of the combined observations is better than 9.7mm.The orbit overlap arc comparison method is used to compare the precision of orbit determination of spaceborne GPS data with two periods of 48 hours. The 3D accuracy is better than 3.65 cm.The accuracy of orbit determination can be increased by 3.866 m and the elevation error by 1.171 m under the condition of no ground point control.
【作者单位】：西安航天天绘数据技术有限公司;宇航动力学国家重点实验室;中国西安卫星测控中心;
【基金】：国家自然科学基金(11503096) 宇航动力学国家重点实验室开放基金(2016ADL-DW0101)~~
【分类号】：P228

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