单频GPS接收机动态定位的相位与伪距联合算法及其周跳检测

利用单频GPS接收机进行实时动态差分时 ,相位观测值整周模糊度的实时确定比较困难 ;而利用伪距观测值求解位置虽不存在解算整周模糊度问题 ,但观测噪声较大。将相位和伪距联合起来处理 ,给予相位和伪距观测值不同的权 ,在一定程度上改善了法方程的病态性质 ,解算精度高于单纯的伪距差分 ,接近单纯的相位差分精度 ,同时给出了相位与伪距联合算法的数学模型和数值结果 ,并讨论了动态定位中的周跳探测方法。

REAL-TIME POSITIONING ALGORITHM WITH SINGLE FREQUENCY GPS PHASE AND PSEUDO-RANGE AND DETECTION OF CYCLE SLIP

When realizing kinetic GPS differenced positioning using single frequency GPS receiver, the decision of integer ambiguity of phase observation is rather difficult. Using pseudo range differenced positioning method can estimate position without solving integer ambiguity, but its noise is cosiderable. This paper handles phase together with pseudo range, giving pseudo range and phase different weight, so the singularity of normal equation is corrected to some degree. It is superior to simple pseudo range differenced method, the precision almost approaches to that of RTK. We put forward the model of the algorithm and discuss the detection of cycle slip.