Abstract
Variations in precipitable water vapor (PWV) can be used to investigate a typhoon (TY). In this paper, TY Haima along the Philippine Area of Responsibility (PAR) were investigated using GNSS-derived PWV of two stations, PBAT and PBAS, in Luzon along with other relevant atmospheric parameters. The results show that TY’s regions are reflected in PWV variations. As TY Haima approached and left the two stations, their recorded PWV values increased and decreased which are consistent with results of other studies [4] [5] [10] but with positive difference of PWV values between the two, indicating that different regions of the TY hit the two stations, with PBAT having higher and lower PWV values than PBAS before and after the TY hit. Using distance calculated between the eye of the TY and the two stations, pressure and rainfall data, it was deduced that PBAT is nearer to the eye of the TY than PBAS, suggesting that a station nearer to the eye of the TY will have higher PWVs than a station in a different region of the TY.
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