Effects and disturbances on GPS-derived zenith tropospheric delay during the CONT08 campaign

CORC > 上海天文台 > 中国科学院上海天文台 > 空间导航与定位技术重点实验室

	Effects and disturbances on GPS-derived zenith tropospheric delay during the CONT08 campaign
	Wei, Haohan 1,2,3; Jin, Shuanggen3 ; He, Xiufeng 1
刊名	ADVANCES IN SPACE RESEARCH
	2012-09-01
卷号	50 期号:5 页码:632-641
关键词	Zenith tropospheric delay GPS VLBI CONT08
英文摘要	The zenith total delay (ZTD) can be retrieved from space geodetic techniques, e.g., Global Positioning System (GPS) and Very Long Baseline Interferometry (VLBI), which plays a key role in climatological and atmospheric sciences. However, ZTD estimates still have lots of effects and uncertainties, particularly in GPS model errors. The continuous VLBI observations provide an opportunity to assess GPS ZTD estimates during the Continuous VLBI Campaign 2008 (CONT08) at 11 co-located stations from August 12 to 26, 2008. In this paper, the effects on GPS ZTD estimate and its disturbances are investigated using different mapping function models (GMF, NMF, and VMF1), Phase Center Variation (PCV) models (AZEL and ELEV) and Ocean Tide Loading (OTL) models (FES2004, CSR4.0 and GOT00). It has shown that the ZTDs from VLBI and GPS have an agreement in -3.88-3.74 mm with correlation coefficients of higher than 0.87. For mapping function models, there are no obvious differences, while the PCV model of ELEV is always a little better than AZEL for large scale network with mixed antenna types. For stations near to the coastlines, ocean loading effects must be corrected. While for short period, the effects with OTL models of FFES2004, CSR4.0 and GOT00 are always at the same level. In addition, significant diurnal cycles S-1 (24 h period) and semidiurnal cycles S-2 (12 h period) of GPS ZTD are found with amplitudes between 0.82 and 13.84 mm and 0.30 and 5.23 mm, respectively, which are closer to VLBI ZTD estimates. The correlation coefficients between VLBI and GPS ZTD are 0.85 and 0.95 in S-1 and S-2, respectively. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	MAPPING FUNCTIONS ; RADIO INTERFEROMETRY ; TIME-SERIES ; WET DELAYS ; VLBI ; WATER ; MODELS ; METEOROLOGY ; PARAMETERS ; NETWORK
收录类别	SCI
语种	英语
WOS记录号	WOS:000307139800010
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18080]
专题	上海天文台_空间导航与定位技术重点实验室
作者单位	1.Hohai Univ, Inst Satellite Nav & Spatial Informat Syst, Nanjing 210098, Jiangsu, Peoples R China 2.Nanjing Forestry Univ, Coll Civil Engn, Nanjing 210037, Jiangsu, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Wei, Haohan,Jin, Shuanggen,He, Xiufeng. Effects and disturbances on GPS-derived zenith tropospheric delay during the CONT08 campaign[J]. ADVANCES IN SPACE RESEARCH,2012,50(5):632-641.
APA	Wei, Haohan,Jin, Shuanggen,&He, Xiufeng.(2012).Effects and disturbances on GPS-derived zenith tropospheric delay during the CONT08 campaign.ADVANCES IN SPACE RESEARCH,50(5),632-641.
MLA	Wei, Haohan,et al."Effects and disturbances on GPS-derived zenith tropospheric delay during the CONT08 campaign".ADVANCES IN SPACE RESEARCH 50.5(2012):632-641.