Comparison of precipitable water over Ghana using GPS signals and reanalysis products

A.A. Acheampong; C. Fosu; L.K. Amekudzi; Eigil Kaas

doi:10.1515/jogs-2015-0016

Comparison of precipitable water over Ghana using GPS signals and reanalysis products

A.A. Acheampong, C. Fosu, L.K. Amekudzi, Eigil Kaas

Climate and Geophysics

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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 coefficients, 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.

Original language	English
Journal	Journal of Geodetic Science
Volume	5
Issue number	1
Pages (from-to)	163-170
ISSN	2081-9919
DOIs	https://doi.org/10.1515/jogs-2015-0016
Publication status	Published - 30 Nov 2015

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[Journal of Geodetic Science] Comparison of precipitable water over Ghanausing GPS signals and reanalysis productsFinal published version, 2.29 MBLicence: CC BY

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title = "Comparison of precipitable water over Ghana using GPS signals and reanalysis products",

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 coefficients, 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. ",

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T1 - Comparison of precipitable water over Ghana using GPS signals and reanalysis products

AU - Acheampong, A.A.

AU - Fosu, C.

AU - Amekudzi, L.K.

AU - Kaas, Eigil

PY - 2015/11/30

Y1 - 2015/11/30

N2 - 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 coefficients, 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.

AB - 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 coefficients, 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.

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DO - 10.1515/jogs-2015-0016

M3 - Journal article

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Comparison of precipitable water over Ghana using GPS signals and reanalysis products

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