E3S Web Conf.
Volume 94, 2019International Symposium on Global Navigation Satellite System 2018 (ISGNSS 2018)
|Number of page(s)||6|
|Section||Atmosphere, Climate, and Weather|
|Published online||08 May 2019|
Variation of Precipitable Water Vapor derived from GNSS CORS Observations in Thailand
Department of Survey Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Patumwan, Bangkok 10330, Thailand
This research aims to study a distance variation of Precipitable Water Vapor (PWV) between CORS stations in Thailand using a Precise Point Positioning (PPP) technique. Nowadays, GNSS Continuously Operating Reference Stations (CORS) is not only used to obtain precise positioning applications but also plays an important role in meteorological applications. With a recent establishment of GNSS CORS around Thai region, the PWV can be accurately derived from these GNSS CORS data using the scientific Position and Navigation Data Analyst (PANDA) GNSS processing software. One-year period of GNSS CORS data collected between 1 January and 31 December 2016 are used in this study. The GNSS CORS data used in this study are gathered from various agencies, i.e. Chulalongkorn University, Department of Lands and Department of Public Works and Town & Country Planning. However, a coverage distance from each GNSS CORS station for PWV estimations is not precisely determined for Thai region. This information can help reduce expenses in an installation and maintenance of meteorology sensors at each GNSS CORS. Therefore, this paper focuses on determining the distance variation of PWV between GNSS CORS stations and the coverage distance from each CORS for PWV estimations. The result shows that the coverage distance from each CORS station at 74 km or less can provide accurate PWV in Thai region.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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