British and French Gravity Datums Connected via the Channel Tunnel
This Report describes a project to determine absolute gravity values along a continuous profile within the Channel Tunnel service tunnel. The work was carried out in close collaboration with the Ordnance Survey of Great Britain (who were simultaneously undertaking a reciprocal heighting traverse) and with the Institute Géographique National (who undertook first order geodetic levelling).
KeywordsTide Gauge Bouguer Anomaly Bench Mark Ring Number Absolute Gravity
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