【摘要】 用LAMBDA方法确定GPS载波相位测量的整周模糊度,需要较高精度的浮点解。但用短时间GPS观测值构建的法方程容易出现病态,以致法方程的解很不稳定。本文使用谱修正迭代法,消除法方程病态,进而用LAMBDA方法确定整周模糊度。实验结果表明,对于1min左右的单频GPS载波相位测量,利用本文方法即可正确地解算出它的整周模糊度,从而实现厘米级定位。更多还原

【Abstract】 When LAMBDA method is used to fix an integer ambiguity of GPS carrier phase measurement,it is necessary to have a high accuracy of float solution.But the normal equation that is constituted by short time observable of GPS carrier phase measurement,could easily give an abnormal state.It results in very instable solution for the normal equation.This paper proposes the algorithm,which uses a spectrum correction iteration to eliminate the abnormal state of the normal equation.Then,LAMBDA method is used to solve the integer ambiguity of GPS carrier phase measurement.The experimental results indicate that the mentioned algorithm can solve that of single frequency at about 1 minute,and acquire the positioning at cm level.更多还原