全球定位系统的差分伪距定位的算法研究

Algorithms for Differential GPS Positioning with Code Pseudo-range

分析了GPS差分伪距绝对定位的传统算法,并提出了一种通过求差,将GPS绝对定位的非线性观测方程转化成线性方程直接求解观测站坐标的新算法。通过实例计算表明该方法计算简单,不需要观测站的初始坐标信息,不需要求导计算和迭代计算,通过采用差分绝对定位的模拟观测数据进行计算。计算结果表明,对于提高GPS差分伪距单点定位的解算速度和精度具有重要的应用价值。

The observation equations of GPS positioning are nonlinear. These equations are usually solved by Taylor series expansion and least-squares method. The common algorithms for differential GPS positioning are analyzed. A new algorithm is put forward which can be used to transform nonlinear equations to linear equations by differentiating. An example demonstrates the effectiveness of the new method.