DOI: 10.3724/SP.J.1246.2013.04051

Journal of Grodesy and Geodynamics (大地测量与地球动力学) 2013/4:4 PP.51-56

Empirical model for mean temperature and assessment of precipitable water vapor derived from GPS

The estimation of Precipitable Water Vapor (PWV) derived from Global Positioning System (GPS) data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data (No.57494) in Wuhan.The applicability of Saastamoinen (SAAS), Hopfield and Black models used for estimating Zenith Hydrostatic Delay (ZHD) and Zenith Wet Delay (ZWD) and different  models is verified in the estimation of GPS-derived PWV for the applied area.The experimental results demonstrated that: 1) the precision of PWV estimated from Black model used for calculating ZHD (ZHDB) is lower than that of SAAS (ZHDSAAS ) model and Hopfield model (ZHDH) with the RMS of 4.16 mm; 2) the RMS of PWV estimated from SAAS model used for calculating ZWD (SAAS) is 3.78 mm; 3) the well-known Bevis model gives similar accuracy compared with the site-specific models for Tm in terms of surface temperature (Ts) and surface pressure (Ps), which can reach the accuracy inside 1 mm in the GPS-derived PWV estimates.

Key words:

ReleaseDate:2015-04-22 18:55:55

[1] Suresh Raju C, Saha K, Thampi B V, et al. Empirical model formean temperature for Indian zone and estimation of precipitablewater vapor from ground based GPS measurements. Ann Geophys., 2007, 25: 1935-1948.

[2] Sung H. Byun and Yoaz E. Bar-sever. A new type of tropospherezenith path delay product of the international GNSS service. JGeod, 2009, 83: 367-373.

[3] Jin Shuanggen, Luo O F and Gleason S. Characterization of diurnal cycles in ZTD from a decade of global GPS observations. JGeod., 2009, 83:537-545.

[4] Wang Yong, Liu Yanping, Liu Lintao, et al. Retrieval of thechange of precipitable water vapor with zenith tropospheric delayin the Chinese mainland. Advances in Space Research, 2009,43: 82-88.

[5] Heise S, Dick G, Gendt G, et al. Integrated water vapor fromIGS ground-based GPS observations: initial results from a global5-min data set. Ann Geophys., 2009, 27: 2851-2859.

[6] Liu Yanxiong. Remote sensing of atmospheric water vapor usingGPS data in the Hong Kong region. The Hong Kong PolytechnicUniversity, 2000.

[7] Zhang Hongping, Liu Jingnan, Zhu Wenyao, et al. Remote sensing of PWV using ground-based GPS data in Wuhan region. Progress in Astronomy, 2005, 23(2): 169-179.

[8] Chen Hongbin and Lu Daren. Atmospheric path delay correctionin the GPS measurements. Acta Geodaetica Et Cartographica Sinica, 1996, 25(2): 127-132 (in Chinese).

[9] Li Zhenghang, Xu Xiaohua, Luo Jia, et al. Inversion of the distribution and bariation of ZWD over the Three Gorge area withGPS observation. Geomatics and Information Science of WuhanUniversity, 2003, 28(4): 393-396.

[10] Wang Yong, Liu Yanping, Liu Lintao, et al. Retrieval of thechange of precipitable water vapor by GPS technique. Geo-spatial Information Science, 2007, 10(4): 265-268.

[11] BORB,S ,. Derivation of precipitable water from GPS data: Anapplication to meteorology. Phys Chem Earth., 1998, 23(1):87-90.

[12] Ross R J and Rosenfeld S. Estimating mean weighted temperatureof the atmosphere for global positioning system applications. Journal of Geophysical Research, 1997, 102(D18): 21719-21730.

[13] Chen Yongqi, Liu Yanxiong, Wang Xiaoya, et al. GPS real-timeestimation of precipitable water vapor Hong Kong experiences.Acta geodaetica et cartographica sinica, 2007, 36(1): 9-12.

[14] Constantin-Octavian Andrei and Ruizhi Chen. Assessment oftime-series of troposphere zenith delays derived from the globalData assimilation system numerical weather model. GPS Solut,2009, 13:109-117.

[15] Qu Jianguang, Zhao Liping and Liu Jiyu. Assessing the precisionof SAAS and Hopfield zenith wet delay model using GPS data.Journal of Heilongjiang Institute of Technology, 2006, 20(1):1-5.

[16] Sridevi Jade, Vijayan M S M, Gaur V K, et al. Estimates of precipitable water vapour from GPS data over the Indian subcontinent.Journal of Atmospheric and Solar-Terrestrial Physics, 2005,67: 623-635.

[17] Bevis M, Businger S, Herring T A, et al. GPS Meteorology: Remote sensing of atmospheric water vapor using the global positioning system. J Geophys Res., 1992, 97(D14): 15787-15801.