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:
60757.0 2025 3 23 82 0.05774 0.36162 0.042070 60758.0 2025 3 24 83 0.05734 0.36286 0.042205 60759.0 2025 3 25 84 0.05763 0.36405 0.042203 60760.0 2025 3 26 85 0.05790 0.36558 0.041922 60761.0 2025 3 27 86 0.05798 0.36736 0.041346 60762.0 2025 3 28 87 0.05798 0.36924 0.040494 60763.0 2025 3 29 88 0.05798 0.37102 0.039424 60764.0 2025 3 30 89 0.05823 0.37272 0.038362 60765.0 2025 3 31 90 0.05842 0.37450 0.037478 60766.0 2025 4 1 91 0.05835 0.37633 0.036903 60767.0 2025 4 2 92 0.05844 0.37787 0.036643 60768.0 2025 4 3 93 0.05841 0.37941 0.036693 60769.0 2025 4 4 94 0.05850 0.38082 0.036925 60770.0 2025 4 5 95 0.05872 0.38214 0.037172 60771.0 2025 4 6 96 0.05906 0.38340 0.037312 60772.0 2025 4 7 97 0.05950 0.38466 0.037279 60773.0 2025 4 8 98 0.06000 0.38591 0.037051 60774.0 2025 4 9 99 0.06055 0.38715 0.036651 60775.0 2025 4 10 100 0.06114 0.38840 0.036130 60776.0 2025 4 11 101 0.06175 0.38963 0.035567 60777.0 2025 4 12 102 0.06239 0.39085 0.035039