GNSS Meteorology

Abstract

GNSS meteorology is the remote sensing of the atmosphere (troposphere) using Global Navigation Satellite Systems (GNSS) to derive information about its state. The most interesting information is a delay of the signal propagation due to the water vapor content - the Slant Wet Delay (SWD). The inverse modeling technique being concern here is the tomography. It is the transformation of the slant integrated observation of state of the atmosphere (SWD), to the three dimensional distribution of the water vapor. Over past six years the studies on GNSS tomography were performed in the Wroclaw University of Environmental and Life Sciences on the GNSS tomography. Since 2008 the new national permanent GNSS network ASG-EUPOS (about 130 GNSS reference stations) has been established in Poland (www.asgeupos.pl). This paper presents the issues of the Near Real Time troposphere model construction, characteristic of GNSS and meteorological data and the building of the required IT infrastructure.