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BDS载波相位历元间差分测速方法研究

发布时间:2019-01-19 20:01
【摘要】:针对载波相位历元间差分测速前后历元选取不同广播星历计算时,卫星钟差跳变导致测速结果错误突变的问题,提出前后历元仍采用相同的广播星历来计算卫星位置和钟差的改进方法。用北斗实测数据验证了方法的正确性,并评估了北斗测速的精度。实验结果表明:静态条件下,北斗载波相位历元间差分测速精度可达mm/s级;动态条件下,采样率1Hz,测速结果与高精度组合导航测速结果符合精度为cm/s级;并且测速精度与物体的动态条件(如加速度)有一定的相关性。
[Abstract]:When different broadcast ephemeris are selected before and after differential velocimetry between carrier phase epochs, the satellite clock difference jump causes the wrong mutation of the velocity measurement results. An improved method of calculating satellite position and clock difference using the same broadcast stars is proposed. The correctness of the method is verified by the measured data of Beidou, and the accuracy of Beidou velocity measurement is evaluated. The experimental results show that the accuracy of Beidou carrier phase differential velocimetry can reach mm/s level under static condition, and the sampling rate is 1 Hz under dynamic condition, and the accuracy of velocity measurement is cm/s level with that of high precision integrated navigation. And the accuracy of velocity measurement is related to the dynamic condition (such as acceleration) of the object.
【作者单位】: 武汉大学卫星导航定位技术研究中心;
【基金】:水利部公益性行业科研专项基金资助项目(201401072)
【分类号】:P228.4

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