Comparison of precipitable water over Ghana using GPS signals and reanalysis products
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Date
2015-11
Journal Title
Journal ISSN
Volume Title
Publisher
J. Geod. Sci.
Abstract
Signals from Global Navigational Satellite Systems (GNSS) when integrated with surface meteorological parameters can be used to sense atmospheric water
vapour. Using gLAB software and employing precise point
positioning techniques, zenith troposphere delays (ZTD)
for a GPS base station at KNUST, Kumasi have been computed and used to retrieve Precipitable Water (PW). The
PW values obtained were compared with products from
ERA-Interim and NCEP reanalysis data. The correlation
coefcients, r, determined from these comparisons were
0.839 and 0.729 for ERA-interim and NCEP respectively.
This study has demonstrated that water vapour can be
retrieved with high precision from GNSS signal. Furthermore, a location map have been produced to serve as a
guide in adopting and installing GNSS base stations in
Ghana to achieve a country wide coverage of GNSS based
water vapour monitoring
Description
An article published by J. Geod. Sci. 2015; 5:163–170 and available at DOI 10.1515/jogs-2015-0016
Keywords
GNSS, integrated water vapour, numerical weather prediction, precipitable water, reanalysis mode
Citation
J. Geod. Sci. 2015; 5:163–170