A new precision improvement in zenith tropospheric delay estimation by GPS

	A new precision improvement in zenith tropospheric delay estimation by GPS
	Jin, SG ; Park, PH
刊名	CURRENT SCIENCE
	2005-09-25
卷号	89 期号:6 页码:997-1000
关键词	GPS precision stochastic model zenith tropospheric delay
英文摘要	Accurate GPS-derived ZTD (zenith tropospheric delay) plays a key role in near real-time weather forecasting, especially in improving the precision of Numerical Weather Prediction (NWP) models. However, ZTD is usually estimated under the assumption that all the GPS measurements, carrier phases or pseudo-ranges, have the same accuracy. These assumptions are unrealistic, which will inevitably degrade the precision of ZTD estimation. This communication aims to further improve the precision of ZTD estimation by stochastic modelling. The results show that the precision of GPS-derived ZTD can be obviously improved using a suitable stochastic model for GPS measurements. The stochastic model using satellite elevation angle-based cosine function is better than other investigated stochastic models. This improvement of ZTD estimation is certainly critical for reliable NWP and other tropospheric delay corrections.
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	PRECIPITABLE WATER ; METEOROLOGY ; MODEL ; VAPOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000232536500023
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19398]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Korea Astron & Space Sci Inst, Space Geodesy Res Grp, Taejon 305348, South Korea 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Univ New S Wales, Sch Surveying & Spatial Informat Syst, Sydney, NSW 2052, Australia
推荐引用方式 GB/T 7714	Jin, SG,Park, PH. A new precision improvement in zenith tropospheric delay estimation by GPS[J]. CURRENT SCIENCE,2005,89(6):997-1000.
APA	Jin, SG,&Park, PH.(2005).A new precision improvement in zenith tropospheric delay estimation by GPS.CURRENT SCIENCE,89(6),997-1000.
MLA	Jin, SG,et al."A new precision improvement in zenith tropospheric delay estimation by GPS".CURRENT SCIENCE 89.6(2005):997-1000.