Integrated Water Vapor from SIRGAS tropospheric products, meteorological and ERA5 data

M. F. CAMISAY; M.V. MACKERN; M.L. MATEO; P. A. ROSELL

Workshop; 2. ICCC Workshop Geodesy for Climate Research; 2023

IAG

The american network of GNSS continuous stations, called SIRGAS-CON, currently has more than 450 stations. Since 2014, SIRGAS implemented a strategy to combine the tropospheric parameters estimated by different analysis centers (ACs), in their weekly routine. The ZTDs obtained from the combination are considered final SIRGAS products and are published weekly on the SIRGAS website (https://sirgas.ipgh.org/en/products/tropospheric-delays/). From the Neutral Atmosphere  Analysis Center of SIRGAS, Centro de Ingeniería Mendoza Argentina (CIMA), the final tropospheric products are used for compute the integrated water vapor (IWV) in each GNSS station.  This contribution presents the IWV time series of the Uruguayan stations (17), for a period of 10 years (2012-2021). The calculated monthly IWV mean values are showed.In addition, we present the results of the IWV computations, using insitu meteorological data from stations of the Instituto Uruguayo de Meteorología INUMET (www.inumet.gub.uy). Both IWV solutions  were compared.Agreement was evaluated in terms of mean bias and rms of IWV between CIMA estimations (with ERA5 data) and new series computeted with meteorological insitu data (mean bias 0.029 kg / m2, mean rms 0.405 kg / m2 and mean standard deviation 0.282 kg / m2). Likewise, the comparison of pressure and temperature extracted from ERA5 with respect to meteorological records is presented