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:
60942.0 2025 9 24 267 0.23117 0.35481 0.089642 60943.0 2025 9 25 268 0.23054 0.35340 0.089760 60944.0 2025 9 26 269 0.22945 0.35166 0.089979 60945.0 2025 9 27 270 0.22797 0.34952 0.090371 60946.0 2025 9 28 271 0.22664 0.34715 0.090975 60947.0 2025 9 29 272 0.22585 0.34502 0.091656 60948.0 2025 9 30 273 0.22524 0.34311 0.092415 60949.0 2025 10 1 274 0.22465 0.34134 0.093076 60950.0 2025 10 2 275 0.22406 0.33978 0.093475 60951.0 2025 10 3 276 0.22312 0.33831 0.093625 60952.0 2025 10 4 277 0.22230 0.33686 0.093572 60953.0 2025 10 5 278 0.22116 0.33539 0.093296 60954.0 2025 10 6 279 0.22009 0.33400 0.092851 60955.0 2025 10 7 280 0.21908 0.33269 0.092360 60956.0 2025 10 8 281 0.21810 0.33142 0.091980 60957.0 2025 10 9 282 0.21718 0.33019 0.091845 60958.0 2025 10 10 283 0.21627 0.32900 0.092026 60959.0 2025 10 11 284 0.21535 0.32785 0.092502 60960.0 2025 10 12 285 0.21441 0.32674 0.093172 60961.0 2025 10 13 286 0.21346 0.32567 0.093893 60962.0 2025 10 14 287 0.21248 0.32464 0.094510