The Determination of Mean Sea Level Using GPS
In 1986, as a result of the Royal Society’s Geodesy Research Initiative, research groups from the University of Nottingham, the University of Edinburgh, and the Proudman Oceanographic Laboratory, in conjunction with the Ordnance Survey of Great Britain, began an investigation into the apparent discrepancy between geodetic and oceanographic methods of levelling. This discrepancy is manifested as a sea slope in a north-south direction around the coast of Great Britain. The project has involved combining GPS measurements with a high precision geoid to provide an independent determination of geoidal height differences on the East coast.
In May 1988 a major GPS campaign was carried out. Measurements were made between the Edinburgh and Lowestoft tide gauges, incorporating other tide gauges en route. Observations were also taken simultaneously at four fiducial stations to allow the computation of precise satellite ephemerides during the period of the campaign.
KeywordsSatellite Laser Range Satellite Constellation Royal Greenwich Observatory Ordnance Survey Precise Ephemerid
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