ZTD parameters estimated per hour, at SIRGAS GNSS stations, published by day and by year: First calculation performed of combined products

Abstract

The present geodetic reference frame in Latin America and the Caribbean is given by a network of about 600 continuously operating GNSS stations. These stations are routinely processed by ten Analysis Centres following the guidelines and standards set up by the International Earth Rotation and Reference Systems Service (IERS) and International GNSS Service (IGS). The SIRGAS Analysis Centres estimate daily and weekly station positions and station zenith tropospheric path delays (ZTD) with an hourly sampling rate. These are the final ZTD products, they are the results of combining the individual ZTD estimations to generate consistent troposphere solutions over the entire region and to provide reliable time series of troposphere parameters, to be used as a reference. These series cover ZTD for a time-span of 10 years (2014–1/205).