Absolute Gravimetry
Small changes in height cause detectable differences in the strength of the gravitational field experienced by a falling object.
The purpose of running an AG at the SGF Herstmonceux is to provide a long-term data set which can provide vertical height movements independent of those from the space based geodetic techniques. A long-term aim is to investigate the Global Isostatic Adjustment (GIA) signal from this region.
AG data has been collected at Herstmonceux since 2006 and it has been shown that there are signals within the data which are of interest and should be removed. The signals detected are on various time scales and from various of sources. Investigations are being carried out on tidal, atmospheric and hydrological responses.
Earth Orientation Parameters:
60414.0 2024 4 14 105 -0.00649 0.36760 -0.017571 60415.0 2024 4 15 106 -0.00597 0.36929 -0.017232 60416.0 2024 4 16 107 -0.00496 0.37138 -0.016919 60417.0 2024 4 17 108 -0.00376 0.37393 -0.016673 60418.0 2024 4 18 109 -0.00295 0.37661 -0.016655 60419.0 2024 4 19 110 -0.00242 0.37903 -0.016774 60420.0 2024 4 20 111 -0.00212 0.38154 -0.017106 60421.0 2024 4 21 112 -0.00222 0.38409 -0.017549 60422.0 2024 4 22 113 -0.00226 0.38641 -0.018055 60423.0 2024 4 23 114 -0.00173 0.38854 -0.018565 60424.0 2024 4 24 115 -0.00114 0.39073 -0.018983 60425.0 2024 4 25 116 -0.00008 0.39283 -0.019227 60426.0 2024 4 26 117 0.00112 0.39496 -0.019253 60427.0 2024 4 27 118 0.00242 0.39713 -0.019041 60428.0 2024 4 28 119 0.00376 0.39932 -0.018658 60429.0 2024 4 29 120 0.00511 0.40153 -0.018204 60430.0 2024 4 30 121 0.00647 0.40376 -0.017786 60431.0 2024 5 1 122 0.00782 0.40596 -0.017522 60432.0 2024 5 2 123 0.00919 0.40812 -0.017507 60433.0 2024 5 3 124 0.01059 0.41024 -0.017789 60434.0 2024 5 4 125 0.01201 0.41231 -0.018364