Assessment of zenith tropospheric delay derived from Single-Site Improved EGNOS model over Asia area

Abstract

Abstract:

In this study, four years of the zenith tropospheric delay (ZTD) data from 2008 to 2011 are observed from 46 IGS sites distributed in Asian area is regarded as reference valve that used to assess the accuracy of ZTD calculated from EGNOS model. The Single-site Improved EGNOS model(named as SSIEGNOS model) over Asian is established by using three years of daily bias of the ZTD calculated from the EGNOS model that analyzed by Fast Fourier transformation, and the accuracy and application of the EGNOS model and SSIEGNOS model are also analyzed in Asian area. The results are: (1) the bias and RMS show a seasonal variation for the EGNOS model, while for the SSIEGNOS model, the bias and RMS are small and stable. (2) The relation between the bias and the altitude, longitude and latitude are not obvious for the two models, but the RMS decreases with increasing altitude or latitude. (3) Relative to EGNOS model, a significant improvement can be achieved using SSIEGNOS model to predict the ZTD.

Key words: Asian area, EGNOS model, SSIEGNOS model, Zenith tropospheric delay (ZTD), Accuracy analysis

CLC Number:

P228

References

[1] LI Wei, YUAN Yunbin, OU Jikun, et al. A Global Zenith Tropospheric Delay Model IGGtrop for GNSS Applications[J]. Chinese Sciences Bulletin, 2012, 57(15): 1317-1325. (李薇，袁运斌，欧吉坤, 等. 全球对流层天顶延迟模型IGGtrop的建立与分析[J]. 科学通报，2012, 57(15):1317-1325.)
[2] ZHANG Baocheng, OU Jikun, YUAN Yunbin, et al. Extracting Precise Atmospherc Propaganda Delays from Multiple Reference Station GPS Networks [J]. Acta Geodaetica et Cartographica Sinica, 2012, 41(4): 523-528. (张宝成，欧吉坤，袁运斌, 等. 多参考站GPS网提取精密大气延迟[J]. 测绘学报，2012, 41(4): 523-528.)
[3] YI Zhonghai, CHEN Yongqi, ZHU Jianjun, et al. An Approach to Regional Real Time Precise Point Positioning Based on IGS Ultra-rapid Orbit[J]. Acta Geodaetica et Cartographica Sinica, 2011, 40(2): 226-231. (易重海，陈永奇，朱建军, 等. 一种基于IGS超快星历的区域性实时精密单点定位方法[J]. 测绘学报，2011, 40(2): 226-231.)
[4] HUANG Dingfa, LI Chenggang, WU Yaoqiang, et al. Study of the Real-time Network Correction Genernation Approach for GPS/VRS Technique[J]. Acta Geodaetica et Cartographica Sinica, 2007, 36(3): 256-261. (黄丁发，李成钢，吴耀强, 等. GPS/VRS实时网络改正数生成算法研究[J]. 测绘学报，2007, 36(3): 256-261.)
[5] SHEN Xuefeng, GAO Chengfa, PAN Shuguo. Algorithm for Network RTK (VRS) Based on Star Structure[J]. Acta Geodaetica et Cartographica Sinica, 2012, 41(1): 33-40. (沈雪峰，高成发，潘树国. 基于星型结构的虚拟参考站网络实时动态测量关键算法研究[J]. 测绘学报，2012, 41(1): 33-40.)
[6] XIONG Yongliang, HUANG Dingfam, DING Xiaoli, et al. Research on the Modeling of Tropospheric Delay in Virtual Reference Station[J]. Acta Geodaetica et Cartographica Sinica, 2006, 35(2): 118-132. (熊永良，黄丁发，丁晓利，等. 虚拟参考站技术中对流层误差建模方法研究[J]. 测绘学报，2006, 35(2): 118-132.)
[7] LIU Lilong, HUANG Liangke, YAO Chaolong, et al. Research on 4D Modeling for Zenith Tropospheric Delays Based on Regional CORS Network[J]. Journal of Geodesy and Geodynamics, 2012, 32(3): 45-49. (刘立龙，黄良珂，姚朝龙, 等. 基于区域CORS网天顶对流层延迟4D建模研究[J]. 大地测量与地球动力学，2012, 32(3): 45-49.)
[8] HUANG Liangke, LIU Lilong, YAO Chaolong. A Zenith Tropospheric Delay Correction Model Based on the Regional CORS Network[J]. Geodesy and Geodynamics, 2012, 3(4): 53-62.
[9] DAI Wujiao, CHEN Zhaohua, KUANG Cuilin, et al. Modeling Regional Precise Tropospheric Delay[J]. Geomatics and Information Science of Wuhan University, 2011, 36(4): 392-395. (戴吾蛟，陈招华，匡翠林, 等. 区域精密对流层延迟建模[J]. 武汉大学学报: 信息科学版，2011, 36(4): 392-395.)
[10] QU Weijing. The Research and Application of GPS Neutral Atmosphere Zenith Delay over China Area[D]. Shanghai: Shanghai Astronomical Observatory, Chinese Academy of Sciences, 2007. (曲伟菁. 中国地区GPS中性大气天顶延迟研究及应用[D]. 上海：中国科学院上海天文台，2007.)
[11] FARAH A, MOORE T, HILL C J. High Spatial Variation Tropospheric Model for GPS-data Simulation[J]. Journal of Navigation, 2005, 58(3):459-470.
[12] BROMWICH D H, WANG S H. Evaluation of the NCEP-NCAR and ECMWF 15-and 40-yr Reanalyses Using Rawinsonde Data from Two Independent Arctic Field Experiments[J]. Monthly Weather Review—Special Section, 2005, 133(12): 3562-3578 .
[13] CHEN Q M, SONG S L, HEISE S, et al. Assessment of ZTD Derived from ECMWF/NCEP Data with GPS ZTD over China [J]. GPS Solution, 2011, 15(4): 415-425.
[14] CHEN Qinming, SONG Shuli, ZHU Wenyao. An Analysis of the Accuracy of Zenith Tropospheric Delay Calculated from ECMWF/NCEP Data over Asian Area[J]. Chinese Journal of Geophysics, 2012, 55(5): 1541-1548. (陈钦明，宋淑丽，朱文耀. 亚洲地区ECMWF/NCEP资料计算ZTD的精度分析[J]. 地球物理学报, 2012, 55(5): 1541-1548.)
[15] IBRAHIM H E, EI-RRABBANY A. Regional Stochastic Models for NOAA-based Residual Tropospheric Delays[J]. Journal of Navigation, 2008, 61(2): 209-219.
[16] PENNA N, DODSON A, CHEN W. Assessment of EGNOS Tropospheric Correction Model[J]. Journal of Navigation, 2001, 54(1): 37-55.
[17] QU Weijing, ZHU Wenyao, SONG Shuli, et al. The Evaluation of Precision about Hopfield, Saastamoinen and EGNOS Tropospheric Delay Correction Model[J]. Acta Astronomica Sinica, 2008, 49(1): 113-121. (曲伟菁，朱文耀，宋淑丽, 等. 三种对流层延迟改正模型精度评估[J]. 天文学报，2008, 49(1): 113-121.)
[18] SONG Shuli, ZHU Wenyao, CHEN Qinming, et al. Establishment of a New Tropospheric Delay Correction Model over China Area[J]. Science China: Physics, Mechanics & Astronomy, 2011, 54(12): 2271-2283.
[19] WANG Qianxin, XU Guochang, CHEN Zhengyang. Interpolation Method of Tropospheric Delay of High Altitude Rover Based on Regional GPS Network [J]. Geomatics and Information Science of Wuhan University, 2010, 35(12): 1405-1407. (王潜心，许国昌，陈正阳. 利用区域GPS网进行高海拔流动站的对流层延迟量内插[J]. 武汉大学学报: 信息科学版，2010, 35(12):1405-1407.)
[20] DEBLONDE G, MACPHERSON S, MIREAULT Y, et al. Evaluation of GPS Precipitable Water over Canada and the IGS Network[J]. Journal of Applied Meteorology and Climatology, 2005, 44(1): 153-166.