基于相位偏差的实时PPP模糊度固定

采用CNES发布的实时相位偏差数据，实现包含模糊度固定的实时精密单点定位.对全球10个IGS测站10天观测数据进行RTPPP解算，分别统计模糊度首次固定时间和定位精度，结果显示利用实时相位偏差数据能在平均30min内实现模糊度首次固定，模糊度固定时水平位置误差由6cm迅速降低至2cm左右，三维位置误差由10cm迅速降低至5cm左右，同时RTPPP模糊度固定在3h观测内可保持水平3cm、三维5cm左右的定位精度.通过分析得出，基于相位偏差的RTPPP模糊度固定技术具有较高的定位精度和定位稳定性，能够快速实现cm级定位.

Real-time Precise Point Positioning Ambiguity Resolution Based on Phase Biasesormalsize

The real-time phase biases products released by CNES are used to realize real-time precise point positioning with ambiguity resolution. Firstly, the timing characteristics of real-time phase biases products are analyzed, which have high continuity and stability. Then the RTPPP solution is performed on the 10-day observation data of 10 IGS stations, and the first fixed time and positioning accuracy of the ambiguity are calculated respectively. It is concluded that the real-time phase biases product can achieve the first fixed ambiguity within an average time of 30 minutes. When the ambiguity is fixed, the horizontal position error can be quickly reduced from 6 cm to 2cm, and the three-dimensional position error can be quickly reduced from 10cm to about 5cm. At the same time, as the RTPPP ambiguity resolution keeps the result in 3h measurement, the positioning accuracy is about 3cm in 2D and 5cm in 3D. The results show that the real-time PPP ambiguity resolution technology based on phase biases has high positioning accuracy and stability, and can realize centimeter-level positioning quickly. It can promote the application of real-time phase biases products in real-time precise point positioning.