单频GPS整周模糊度动态快速求解的研究

提出了一种动态快速求解整周模糊度的方法,即先对系数阵进行QR分解,然后通过矩阵变换使模糊度参数和位置参数分离,从而降低矩阵的维数,满足实时动态求解的要求,最后应用LAMBDA方法搜索模糊度。为验证该算法,用单频GPS接收机进行了静态定位和动态定位两种试验。结果表明,静态定位误差小于1cm,动态定位误差小于3cm。由此可见,该方法能够为动态用户快速而精确地实施GPS单频动态定位。

Rapid Ambiguity Resolution On-the-Fly for Single Frequency Receiver

The algorithm of rapid ambiguity resolution on-the-fly for single frequency receivers is presented in this paper, Firstly, a method of QR decomposition is applied to decompose the observation matrix of satellites, so as to decrease dimensions of the matrix and to satisfy rapid ambiguity resolution by matrix transformation that can separate out the ambiguity parameter from the position parameter, the LAMBDA method is used to search the fixed ambiguity. The algorithm is applied to two different types of real data to show its effectiveness. Experimental results show that the proposed method is fast and efficient for kinematical users to make use of single frequency receivers to perform DGPS positioning. The method may be used in areas requiring accurate positioning such as navigation and geodesy.