| 单差PPP相位偏差估计方法及有效性分析 |
| |
| 引用本文： | 潘树国,赵兴旺,王庆.单差PPP相位偏差估计方法及有效性分析[J].宇航学报,2012,33(4):436-442. |
| |
| 作者姓名： | 潘树国 赵兴旺 王庆 |
| |
| 作者单位： | 1. 东南大学仪器科学与工程学院,南京,210096
2. 安徽理工大学测绘学院,淮南,232001 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 针对常规浮点解精密单点定位收敛时间长的问题,分析了PPP模型中模糊度不具备整数性质的原因,采用方向数据统计的计算方法,以单差模糊度为研究对象,对相位偏差进行了建模估计。算例从精密单点定位单差模糊度固定、定位精度以及收敛速度等方面对相位偏差改正的有效性进行了分析,结果表明,经相位偏差改正后的PPP模糊度固定成功率、收敛速度有了明显提高,定位精度较浮点解提高了一个量级。
|
| 关 键 词： | 精密单点定位 相位偏差 单差模糊度固定 方向数据统计 |
Estimation and Analysis of Single-Difference PPP Phase Biases |
| |
| PAN Shu-guo
,
ZHAO Xing-wang
,
WANG Qing.Estimation and Analysis of Single-Difference PPP Phase Biases[J].Journal of Astronautics,2012,33(4):436-442. |
| |
| Authors: | PAN Shu-guo ZHAO Xing-wang WANG Qing |
| |
| Institution: | 1(1.School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China; 2.School of Geodesy and Geomatics,Anhui University of Science & Technology,Huainan 232001,China) |
| |
| Abstract: | At present,slow convergence of traditional precise point positioning(PPP) with float ambiguity prevent the wide application in various fields.And the uncalibrated phase biases originating in receivers and satellites prevent the integer ambiguity resolution of PPP,so it can not be directly fixed by using carrier wavelength.In order to solve this problem,an estimation model based on directional statistics is proposed.Then the validity of the phase bias correction for PPP fixed solution is analyzed in terms of the reliability of ambiguity resolution,convergence speed and positioning accuracy.The results show that both reliability of ambiguity resolution and convergence speed of PPP with phase bias correction are improved,and the accuracy of PPP fixed solution can be improved by one order of magnitude. |
| |
| Keywords: | Precise point positioning(ppp) Phase bias Single-difference ambiguity fixing Directional statistics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
