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

CAMISAY, MARÍA FERNANDA; MACKERN, MARÍA VIRGINIA; MATEO, MARÍA LAURA; ROSELL, PATRICIA ALEJANDRA

Workshop; 2. ICCC Workshop 2023; 2023

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 differentanalysis centers (ACs), in their weekly routine. The ZTDs obtained from the combination are considered finalSIRGAS products and are published weekly on the SIRGAS website(https://sirgas.ipgh.org/en/products/tropospheric-delays/). From the Neutral Atmosphere Analysis Center ofSIRGAS, Centro de Ingeniería Mendoza Argentina (CIMA), the final tropospheric products are used for computethe integrated water vapor (IWV) in each GNSS station. This contribution presents the IWV time series of theUruguayan stations (17), for a period of 10 years (2013-2022). The calculated monthly IWV mean values areshowed.In addition, we present the results of the IWV computations, using insitu meteorological data fromstations of the Instituto Uruguayo de Meteorología INUMET (www.inumet.gub.uy). Both IWV solutions werecompared. Agreement was evaluated in terms of mean bias and rms of IWV between CIMA estimations (withERA5 data) and new series computeted with meteorological insitu data (mean bias 0.029 kg / m2, mean rms0.405 kg / m2 and mean standard deviation 0.282 kg / m2). Likewise, the comparison of pressure andtemperature extracted from ERA5 with respect to meteorological records is presented.