Variations of precipitable water vapor using GNSS CORS in Thailand. Issue 376 (2nd January 2021)

• Record Type: Journal Article
• Authors: Trakolkul, Chokchai; Satirapod, Chalermchon
• Is Part Of: Survey review. Volume 53:Issue 376(2021)
• Page Start: 90
• Page End: 96
• Publication Date: 2021-01-02
• Subjects: Continuously Operating Reference Stations (CORS) -- Precipitate Water Vapor (PWV) -- Global Navigation Satellite System (GNSS) -- Precise Point Positioning (PPP); Surveying -- Periodicals; Great Britain -- Surveys -- Periodicals; 526.9
• DOI: 10.1080/00396265.2020.1713611
• Languages: English
• ISSNs: 0039-6265

Abstract

Abstract : This research aims to analyze variation in a time series of Precipitable Water Vapor (PWV time series) using data at 11 widely-distributed Continuously Operating Reference Stations (CORS) in Thailand. In this paper, the PWV time series is estimated based on data from 2007 to 2015, used to monitor trends and seasonal variations. Significant annual variations of PWV are found at all GNSS stations, with amplitude from 6 to 19 kg/m 2 . The variations between the annual amplitudes of PWV in the South and near the ocean coasts are generally smaller than in the inland regions. The phase shift of annual PWV variation is about −0.43 (around July, rainy season). The comparison of PWV and 24-hour cumulative rainfall data showed that the rainy season (running from around mid-May to the end of October) exhibits the slightest swing, and the highest average amount of PWV. These results are consistent with the 24-hour cumulative rainfall data.