北斗高精度相对定位选星方法研究

发布时间：2019-05-22 03:33

【摘要】：针对北斗系统中高轨卫星会带来较全球定位系统(global positioning system,GPS)更为严重的法方程病态性这一问题,分析了双差载波相位观测方程系数矩阵对整周模糊度浮点解解算的影响,结合北斗系统三轨道星座混合的特点,研究了区域北斗高精度相对定位选星方法,以仰角最高的地球同步轨道(geostationary earth orbit,GEO)卫星作为参考星,优先选取仰角高于10°的中地球轨道(medium earth orbit,MEO)卫星,然后按照均匀分布的原则选取倾斜地球同步轨道(inclined geosynchronous satellite orbit,IGSO)卫星。通过对实测数据进行试验和分析,证明了该方法的正确性和合理性,在进行区域北斗高精度相对定位时,能在一定程度上改善法方程的病态性,使模糊度浮点解较快收敛至真值附近,有利于模糊度的快速正确固定。
[Abstract]:In order to solve the problem that the high orbit satellite in Beidou system will bring more serious ill-health of the normal equation than the global positioning system (global positioning system,GPS), the influence of the coefficient matrix of the double difference carrier phase observation equation on the floating point solution of the integer ambiguity is analyzed. Combined with the characteristics of the mixing of three-orbit constellations in Beidou system, the method of selecting stars with high precision relative positioning in Beidou system is studied, and the geosynchronous orbit (geostationary earth orbit,GEO satellite with the highest elevation angle is used as the reference star. The medium Earth orbit (medium earth orbit,MEO satellite with elevation angle higher than 10 掳is preferred, and then the inclined geosynchronous orbit (inclined geosynchronous satellite orbit,IGSO satellite is selected according to the principle of uniform distribution. Through the test and analysis of the measured data, the correctness and rationality of the method are proved, and the ill-health of the normal equation can be improved to a certain extent when the regional Beidou high precision relative positioning is carried out. The floating point solution of ambiguity converges to the true value quickly, which is beneficial to the fast and correct fixing of ambiguity.
【作者单位】：空军工程大学信息与导航学院;中国人民解放军95853部队;
【基金】：国家自然科学基金(61273049)~~
【分类号】：P228.4

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