Vertical Displacement due to Ocean Tidal Loading Around Taiwan Based on GPS Observations

Abstract

Ocean tidal loading (OTL) is an important factor in GPS positioning, especially along the vertical direction. OTL influences the precision of GPS positioning and produces height variations of up to 12 cm. In this study, daily GPS data obtained from 27 GPS tracking stations around Taiwan were collected, and four OTL models were applied to relative static GPS positions derived from these data. The GPS data were obtained from 8 - 14 August 2006 (summer) and 1 - 30 January 2007 (winter). The software Bernese 5.0 was utilized for data processing.

Keywords

• GPS
• Ocean tidal loading
• Vertical displacement
• Taiwan