In English

Evaluation of SWEPOS second-order GNSS network stations for monitoring tropospheric water vapor

Muhammad Tariq Aziz
Göteborg : Chalmers tekniska högskola, 2011. 65 s.
[Examensarbete på avancerad nivå]

Global Navigation Satellite Systems (GNSS) are used in many applications demanding millimeter level accuracy in positioning. These applications includes land monitoring, crustal movements, detection of large co-seismic displacements. Water vapor is widely recognized to be of fundamental importance in determining climate and its sensitivity. Thesis work primarily focus on the assessment of the signal propagation delay estimates from GNSS by comparison with independent data sets such as measurements from climate models and other GNSS processing. This study compares Satellite measurement with other climate models for the period of 2008 - 2011. This is the first time the second order GNSS stations of SWEPOS had been studied for the Tropospheric delay. For the Nine second-order GNSS station of SWEPOS in Sweden were selected randomly to analyzing water vapor activity. The study is necessary for the Tropospheric region due to all the weather related activity occurs in this region as this region contains more than 90% water vapor. My Master Thesis project focused on evaluating the use of GNSS data from the SWEPOS network to estimate trends in Zenith Tropospheric Delay (ZTD) and their respective ZWD and ZHD, caused by the presence of atmospheric water vapor. The Swedish permanent GNSS network, SWEPOS, today consists of more than 200 stations. The 25 core stations built on solid rock base with a good electromagnetic environment. SWEPOS have been thoroughly evaluated for this purpose for many years but the more recently installed second-order stations, often built on roof-tops, may also be of interest for Atmospheric monitoring as well as Geophysical projects.

Nyckelord: SWEPOS, GNSS, SP, Climate, Second-order, Geodetic, Stations, ZTD, ZWD, ZHD, Tropospheric Water Vapor, Residuals, Wet Delay, Hydrostatic Delay

Publikationen registrerades 2012-10-15. Den ändrades senast 2013-04-04

CPL ID: 164753

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