THE METEOROLOGICAL USAGE OF WATER VAPOR DATA OBTAINED FROM GPS

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 885-886 pp

ABSTRACT

The data obtained from Constant GBS (SGBS) networks which are established
generally for the aim of geodesic, geodynamic and navigation studies also contribute to
the meteorological studies.

In this study, hourly temperature and pressure values measured by present
meteorological sensors in SGPS stations as well as water vapor values (PWV) that can
be converted into rain by taking the advantage of GPS observations will be calculated
for Middle Anatolian Region. The values of GPS_IPWV obtained as a result of
calculation will be confirmed with the radiosonde data and will also be compared with
MM5 weather forecast model results used in State Meteorological Service (DMI). This
study, which covers Middle Anatolian Region, will be carried out by using the data
belonging to two radiosonde stations of DMI that are present in Ankara and Isparta.

In this study, the consistence between PWV values calculated from GPS values and
PWV values obtained from MM5 model and radiosonde will be examined. It is
evaluated with this preliminary study that the GPS meteorology studies which has been
just present in Turkey will be more economical and meaningful from the point of both
geodesy-geophysicist and meteorologists to use present station data of DMI instead of
establishing a meteorology sensor in every SGPS station in order to use for GPS
calculations.

Keywords: gps , ıpwv , gps meteorology , raın forecast