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讨论了如何从星上下传的卫星位置数据中重建星载GPS伪距观测量,分析了重建伪距数据事后动力学定轨精度及该方法对提高LEO卫星位置精度的贡献。GRACE-A卫星2008年3月1日—14日实测数据计算结果表明:重建数据事后动力学定轨能显著提高地面主控站接收到的LEO卫星实时位置精度;其中由C/A码伪距和广播星历实时单点定位得到的卫星位置精度约为15m,重建伪距事后动力学定轨得到的卫星位置精度约为2m。 更多还原

【Abstract】 The method to rebuild space-borne pseudo-range measurements from real-time position data is discussed first in this paper.And then,the accuracy of dynamic orbit determination using rebuilt pseudo-range measurements and precise GPS ephemeris is analyzed in detail.Data from GRACE-A satellite from March 1 to 14 in 2008 is processed for this purpose.Research results show that the accuracy of real-time single point positioning using C/A code pseudo-range measurements and GPS broadcast ephemeris is ab... 更多还原