Near Real Time Data Set of Ground Based GPS Tropospheric Estimates
Pacione, R.¹; Vespe, F.^2
1e-GEOS s.p.a; ²Agenzia Spaziale Italiana

For several years, ASI has been involved in GPS data analysis of regional permanent network. One main activities is the computation of NRT tropospheric parameters. Zenith Total Delay estimates are delivered every hour to the European E-GVAP (EUMETNET GPS Water Vapour Programme) with the goal to use them for numerical weather prediction. At present on a routine basis a network of 120 permanent sites is processed in post-processing and half of them are analyzed in NRT.

Comparisons and validation w.r.t independent technique as VLBI and Radiosonde will be provided together with an assessment of the ZTD uncertainties.