一种改进的全球对流层天顶延迟模型

doi:10.11947/j.AGCS.2015.20140089

测绘学报 ›› 2015, Vol. 44 ›› Issue (3): 242-249.doi: 10.11947/j.AGCS.2015.20140089

一种改进的全球对流层天顶延迟模型

姚宜斌^1,2, 胡羽丰¹, 余琛¹

1. 武汉大学测绘学院, 湖北武汉 430079;
2. 武汉大学地球空间环境与大地测量教育部重点实验室, 湖北武汉 430079

收稿日期:2014-02-19 修回日期:2014-07-27 出版日期:2015-03-20 发布日期:2015-04-01
作者简介:姚宜斌(1976—),男,教授,主要从事测量数据处理理论与方法、GPS空间环境学等研究. E-mail:ybyao@whu.edu.cn
基金资助:
国家自然科学基金(41174012;41274022);国家863计划(2013AA122502);教育部新世纪优秀人才支持计划(NCET-12-0428);高校基本科研业务费专项资金(2014214020202);国家测绘地理信息局测绘基础研究基金(13-02-09)

An Improved Global Zenith Tropospheric Delay Model

YAO Yibin^1,2, HU Yufeng¹, YU Chen¹

1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
2. Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China

Received:2014-02-19 Revised:2014-07-27 Online:2015-03-20 Published:2015-04-01
Supported by:
National Natural Science Foundation of China (Nos.41174012;41274022);The National High Technology Research and Development Program of China (No.2013AA122502);The Program for New Century Excellent Talents in University(No.NCET-12-0428);The Fundamental Research Funds for the Central Universities(No.2014214020202);The Basic Research Foundation of National Administration of Surveying, Mapping and Geoinformation of China(No.13-02-09)

摘要/Abstract

摘要： 顾及文献[16]所建立的全球对流层天顶延迟模型GZTD的时间分辨率为24 h,为进一步提高GZTD模型的时间分辨率,利用GGOS atmosphere的2002—2009年全球天顶对流层延迟格网时间序列按照其6h的时间分辨率分别建模,再采用三次样条插值计算任意时刻的天顶对流层延迟估值,由此构建了一种时间分辨率更高(6h)的改进的GZTD模型(GZTD-6h).经过两种模型内符合检验对比分析表明,GZTD-6h模型内符合精度(bias:0.17 cm,RMS:3.9 cm)优于GZTD(bias:0.17 cm,RMS:4.4 cm).使用全球IGS站进行外符合检验,统计结果表明GZTD-6h模型(bias:-0.22 cm,RMS:4.05 cm)相比GZTD(bias:-0.45 cm,RMS:4.51 cm)改善明显.

关键词: 天顶对流层延迟, GZTD模型, 时间分辨率, GZTD-6h模型

Abstract: The time resolution of GZTD model developed by Yao^[16] is 24 hours. To further improve the time resolution of GZTD model, we used the time series of global 4D-grid ZTD from 2002 to 2009, provided by GGOS atmosphere, to construct model according to the 6 hours resolution, and then calculated the ZTD at any time using the cubic spline interpolation method. Thus we developed an improved higher time resolution (6h) GZTD model (GZTD-6h). Analyzing the inner coincidence of two models comparatively, we found that GZTD-6h model (bias: 0.17 cm, RMS: 3.9 cm) performs better than GZTD model (bias: 0.17 cm, RMS: 4.4 cm). Using ZTD time series from global International GNSS Service (IGS) sites to analyze outer coincidence, the statistical results shows that GZTD-6h model (bias:-0.22 cm, RMS: 4.05 cm) improves significantly, compared with GZTD model (bias:-0.45 cm, RMS: 4.51 cm).

Key words: zenith tropospheric delay, GZTD model, time resolution, GZTD-6h model

中图分类号:

P228

姚宜斌, 胡羽丰, 余琛. 一种改进的全球对流层天顶延迟模型[J]. 测绘学报, 2015, 44(3): 242-249.

YAO Yibin, HU Yufeng, YU Chen. An Improved Global Zenith Tropospheric Delay Model[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(3): 242-249.

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一种改进的全球对流层天顶延迟模型

An Improved Global Zenith Tropospheric Delay Model

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