【摘要】：針對載波相位歷元間差分測速前后歷元選取不同廣播星歷計算時,衛(wèi)星鐘差跳變導(dǎo)致測速結(jié)果錯誤突變的問題,提出前后歷元仍采用相同的廣播星歷來計算衛(wèi)星位置和鐘差的改進方法。用北斗實測數(shù)據(jù)驗證了方法的正確性,并評估了北斗測速的精度。實驗結(jié)果表明:靜態(tài)條件下,北斗載波相位歷元間差分測速精度可達mm/s級;動態(tài)條件下,采樣率1Hz,測速結(jié)果與高精度組合導(dǎo)航測速結(jié)果符合精度為cm/s級;并且測速精度與物體的動態(tài)條件(如加速度)有一定的相關(guān)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.
【作者單位】： 武漢大學(xué)衛(wèi)星導(dǎo)航定位技術(shù)研究中心;
【基金】：水利部公益性行業(yè)科研專項基金資助項目(201401072)
【分類號】：P228.4

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