【摘要】：按照空間信號用戶測距誤差(User Range Error,URE)定義,參考GPS標準定位服務性能規(guī)范中URE的計算方法,結合北斗衛(wèi)星導航系統(tǒng)(BDS)多星混合星座類型,在考慮仰角限制情況下,詳細推導了適用于BDS的瞬時URE和均方根URE計算公式。利用廣播星歷和精密星歷計算的衛(wèi)星軌道誤差和衛(wèi)星鐘鐘差,帶入所推導的公式,對BDS URE進行分析評估;并使用GNSS接收機原始觀測量和偽距觀測方程計算BDS URE,最后將兩種計算結果進行對比分析。研究結果表明,兩種方法 BDS URE的計算結果基本一致,在95%置信度情況下均小于2.5m,滿足北斗公開服務性能規(guī)范中對空間信號URE的基本要求。
[Abstract]:According to the definition of space signal user ranging error (User Range Error,URE), and referring to the calculation method of URE in GPS standard positioning service specification, combined with the type of (BDS) multi-star hybrid constellation of Beidou satellite navigation system, considering the elevation angle limit, The formulas of instantaneous URE and root-mean-square URE for BDS are derived in detail. Using the satellite orbit error and satellite clock error calculated by broadcast ephemeris and precise ephemeris into the derived formula, the BDS URE is analyzed and evaluated. The original observations and pseudo-range equations of the GNSS receiver are used to calculate the BDS URE,. Finally, the results of the two calculations are compared and analyzed. The results show that the calculated results of the two BDS URE methods are basically the same, and are less than 2.5 m in the case of 95% confidence, which meets the basic requirements of Beidou open service performance specification for spatial signal URE.
【作者單位】： 中國民航大學電子信息與自動化學院;
【基金】：民航安全能力建設項目“北斗機載設備技術標準規(guī)定與應用研究”(AADSA0007) 國家重點研發(fā)計劃“廣域航空安全監(jiān)控技術及應用”項目“星基定位監(jiān)視與機載設備適航技術”課題(2016YFB0502402)
【分類號】：TN967.1

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