一种GPS整周模糊度的解算方法

One Resolution Method of GPS Integer Ambiguity

摘要:

初始整周模糊度的求解是利用GPS载波相位进行测量的关键问题,文中提出了一种GPS整周模糊度快速解算方法。该方法:首先,对双差观测方程中指向卫星的方向阵进行QR分解；然后,通过比较估计出的基线长度和真实的基线长度建立起整周模糊度初始搜索范围；最后,综合利用快速剔除不合理模糊度解的检验方法以得到最终的模糊度解。文中对所提出的算法进行了理论推导,并进行了基于实测数据的实验与分析。实验结果表明,该算法计算量小,快速准确,适合整周模糊度的快速动态求解。

Abstract:

The key of measurement using GPS carrier phase is the determination of integer ambiguity. An algorithm to calculate ambiguity was presented in this paper, which first decomposed the direction matrix of double-difference observation equation by way of QR, then built up the initial search band of integer ambiguity by comparing the estimated base length and the true base length, at last obtained the ambiguity solution using the detection method of quickly rejecting irrational ambiguity solution. The principle was deduced in detail, and computer simulation and real survey data calculation were carried out. The result showed that the method could well be used to do with dynamic ambiguity resolution, with characteristic of small calculation, exactness and swiftness.