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:
60921.0 2025 9 3 246 0.23469 0.38831 0.086653 60922.0 2025 9 4 247 0.23443 0.38719 0.087553 60923.0 2025 9 5 248 0.23387 0.38586 0.088249 60924.0 2025 9 6 249 0.23340 0.38438 0.088665 60925.0 2025 9 7 250 0.23326 0.38279 0.088818 60926.0 2025 9 8 251 0.23370 0.38118 0.088655 60927.0 2025 9 9 252 0.23449 0.37971 0.088275 60928.0 2025 9 10 253 0.23531 0.37845 0.087877 60929.0 2025 9 11 254 0.23607 0.37718 0.087635 60930.0 2025 9 12 255 0.23645 0.37564 0.087627 60931.0 2025 9 13 256 0.23680 0.37420 0.087904 60932.0 2025 9 14 257 0.23680 0.37254 0.088437 60933.0 2025 9 15 258 0.23674 0.37096 0.089122 60934.0 2025 9 16 259 0.23667 0.36942 0.089824 60935.0 2025 9 17 260 0.23656 0.36795 0.090434 60936.0 2025 9 18 261 0.23645 0.36652 0.090883 60937.0 2025 9 19 262 0.23631 0.36510 0.091131 60938.0 2025 9 20 263 0.23612 0.36365 0.091184 60939.0 2025 9 21 264 0.23587 0.36221 0.091090 60940.0 2025 9 22 265 0.23557 0.36077 0.090906 60941.0 2025 9 23 266 0.23523 0.35933 0.090706