【摘要】：針對北斗系統(tǒng)中高軌衛(wèi)星會帶來較全球定位系統(tǒng)(global positioning system,GPS)更為嚴重的法方程病態(tài)性這一問題,分析了雙差載波相位觀測方程系數(shù)矩陣對整周模糊度浮點解解算的影響,結(jié)合北斗系統(tǒng)三軌道星座混合的特點,研究了區(qū)域北斗高精度相對定位選星方法,以仰角最高的地球同步軌道(geostationary earth orbit,GEO)衛(wèi)星作為參考星,優(yōu)先選取仰角高于10°的中地球軌道(medium earth orbit,MEO)衛(wèi)星,然后按照均勻分布的原則選取傾斜地球同步軌道(inclined geosynchronous satellite orbit,IGSO)衛(wèi)星。通過對實測數(shù)據(jù)進行試驗和分析,證明了該方法的正確性和合理性,在進行區(qū)域北斗高精度相對定位時,能在一定程度上改善法方程的病態(tài)性,使模糊度浮點解較快收斂至真值附近,有利于模糊度的快速正確固定。
[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 擄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.
【作者單位】： 空軍工程大學(xué)信息與導(dǎo)航學(xué)院;中國人民解放軍95853部隊;
【基金】：國家自然科學(xué)基金(61273049)~~
【分類號】：P228.4

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