| 水平梯度和映射函数对PPP对流层延迟估计的影响分析 |
| |
| 引用本文： | 李黎,匡翠林,朱建军,陈永奇,李洪玉.水平梯度和映射函数对PPP对流层延迟估计的影响分析[J].工程勘察,2011(5):52-56,60. |
| |
| 作者姓名： | 李黎 匡翠林 朱建军 陈永奇 李洪玉 |
| |
| 作者单位： | 中南大学测绘与国土信息工程系;香港理工大学土地测量与地理资讯学系;内蒙古农业大学水利与土木建筑工程学院; |
| |
| 基金项目： | 国家自然科学基金资助项目(40974007,41004012); 中南大学前沿研究计划(2009QZZD002) |
| |
| 摘 要： | 基于GPS精密单点定位(PPP)技术,比较分析了水平梯度及目前三种主要的映射函数(NMF,VMF1和GMF)对天顶对流层延迟(ZTD)估计精度的影响.研究结果表明,在气象变化剧烈和低高度截止角情况下,附加水平梯度的对流层延迟模型有利于提高ZTD精度;就映射函数效用而言,VMF1和GMF较NMF更优.
|
| 关 键 词： | 对流层延迟 水平梯度 映射函数 精密单点定位 影响分析 |
Influence analysis of horizontal gradients and mapping functions on tropospheric delay estimation |
| |
| Li Li,Kuang Cuilin,Zhu Jianjun,Chen Yongqi,Li Hongyu.Influence analysis of horizontal gradients and mapping functions on tropospheric delay estimation[J].Geotechnical Investigation & Surveying,2011(5):52-56,60. |
| |
| Authors: | Li Li Kuang Cuilin Zhu Jianjun Chen Yongqi Li Hongyu |
| |
| Affiliation: | Li Li1,Kuang Cuilin1,Zhu Jianjun1,Chen Yongqi1,2,Li Hongyu3(1.Department of Survey Engineering and Geomatics,Central South University,Changsha 410083,China,2.Department of Land Surveying and Geo-informatics,Hong Kong Polytechnic University,Hong Kong,3.College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China) |
| |
| Abstract: | Based on GPS Precise Point Positioning(PPP) technology,this paper analyzed the influence of horizontal gradients and three main mapping functions(NMF,VMF1 and GMF) on the accuracy of zenith tropospheric delay(ZTD) estimation.The numerical results show that adding horizontal gradients to tropopheric delay model will improve the ZTD precision when the weather changes dramatically or the cut-off angle of observations is low.As to the effectiveness of mapping functions,VMF1 and GMF are better than NMF. |
| |
| Keywords: | tropospheric delay horizontal gradients mapping function precise point positioning(PPP) influence analysis |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
