中文摘要：

为了提高BDS实时动态定位（RTK）的解算精度，文章研究一种基于非差观测模型的BDS单参考站RTK算法和非差改正数的计算方法，提出一种统一的精密定位数学模型，利用参考站的非差误差改正数以单颗卫星为对象进行误差改正：固定非差宽巷整周模糊度，并固定非差整周模糊度。实验结果表明，利用非差观测模型可实现BDS单参考站RTK定位，并获得厘米级的定位精度。

英文摘要：

In order to improve the solution accuracy of BDS RTK, the paper studied a RTK algorithm of BDS single reference station and the calculation method of the undifferenced correction based on undif- ferenced observation model, and proposed a uniformed mathematical model of precise positioning, by which the error was corrected using undifferenced correction of the reference station with a single satellite as the object, the undifferenced wide lane integer ambiguities were fixed, and the undifferenced integer ambiguities were fixed. Experimental result showed that BDS single reference station RTK could be real- ized using the undifferenced observation model with the cm level of positioning accuracy.