10-Year assessment of GNSS integrated water vapour in the SIRGAS network

ROSELL, PATRICIA A.; MACKERN, M.VIRGINIA; RIVERA, JUAN A.; EUILLADES, PABLO A.

JOURNAL OF SOUTH AMERICAN EARTH SCIENCES

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2023

0895-9811

This work aims to analyse ten years (2012-2022) of integrated water vapour (IWV)values computed with the SIRGAS tropospheric products. We selected 246 sites thatguarantee the continuity of data, and we extracted common statistical values for eachtime series (mean values, standard deviation, and time of daily peaks). With thisinformation, we performed a spatial analysis of the IWV over Latin America and theCaribbean region, that is covered for this geodetic network. We analysed thehomogeneity of the IWV time series, and we applied Rotated Principal ComponentsAnalysis (RPCA) for the comprehension of the seasonal variations of each site. Due tothe extension of the region of interest, we studied the influence of latitude and height inthe behaviour of IWV. We performed an unprecedented analysis of IWV, showing thepotential of the tropospheric products offered by the SIRGAS network