Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China

	Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China
	Chen, Qinming1,2,3 ; Song, Shuli1 ; Heise, Stefan 4; Liou, Yuei-An 5; Zhu, Wenyao 1; Zhao, Jingyang 1,2
刊名	GPS SOLUTIONS
	2011-10-01
卷号	15 期号:4 页码:415-425
关键词	GPS Zenith tropospheric delay (ZTD) CMONOC ECMWF NCEP
英文摘要	The accuracy and feasibility of computing the zenith tropospheric delays (ZTDs) from data of the European Center for Medium-Range Weather Forecasts (ECMWF) and the United States National Centers for Environmental Prediction (NCEP) are studied. The ZTDs are calculated from ECMWF/NCEP pressure-level data by integration and from the surface data with the Saastamoinen model method and then compared with the solutions measured from 28 global positioning system (GPS) stations of the Crustal Movement Observation Network of China (CMONOC) for 1 year. The results are as follows: (1) the error of the integration method is 1-3 cm less than that of the Saastamoinen model method. The agreement between the ECMWF ZTD and GPS ZTD is better than that between NCEP ZTD and GPS ZTD; (2) the bias and root mean square difference (RMSD), especially the latter, have a seasonal variation, and the RMSD decreases with increasing altitude while the variation with latitude is not obvious; and (3) when using the full horizontal resolution of 0.5A degrees A xA 0.5A degrees of the ECMWF meteorological data in place of a reduced 2.5A degrees A xA 2.5A degrees grid, the mean RMSD between GPS and ECMWF ZTD decreases by 4.5 mm. These results illuminated the accuracy and feasibility of computing the tropospheric delays and establishing the ZTD prediction model over China for navigation and positioning with ECMWF and NCEP data.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Remote Sensing
研究领域[WOS]	Remote Sensing
关键词[WOS]	DELAYS ; MODELS
收录类别	SCI
语种	英语
WOS记录号	WOS:000295165500010
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/26399]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 3.SW Univ Sci & Technol, Mianyang, Sichuan, Peoples R China 4.GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, Potsdam, Germany 5.Natl Cent Univ, Ctr Space & Remote Sensing Res, Jhongli, Taiwan
推荐引用方式 GB/T 7714	Chen, Qinming,Song, Shuli,Heise, Stefan,et al. Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China[J]. GPS SOLUTIONS,2011,15(4):415-425.
APA	Chen, Qinming,Song, Shuli,Heise, Stefan,Liou, Yuei-An,Zhu, Wenyao,&Zhao, Jingyang.(2011).Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China.GPS SOLUTIONS,15(4),415-425.
MLA	Chen, Qinming,et al."Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China".GPS SOLUTIONS 15.4(2011):415-425.