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:
60983.0 2025 11 4 308 0.17178 0.31857 0.090038 60984.0 2025 11 5 309 0.16991 0.31838 0.089110 60985.0 2025 11 6 310 0.16787 0.31820 0.088497 60986.0 2025 11 7 311 0.16583 0.31782 0.088185 60987.0 2025 11 8 312 0.16405 0.31709 0.088116 60988.0 2025 11 9 313 0.16300 0.31633 0.088175 60989.0 2025 11 10 314 0.16242 0.31576 0.088183 60990.0 2025 11 11 315 0.16155 0.31530 0.087989 60991.0 2025 11 12 316 0.16017 0.31516 0.087597 60992.0 2025 11 13 317 0.15836 0.31539 0.087067 60993.0 2025 11 14 318 0.15653 0.31544 0.086396 60994.0 2025 11 15 319 0.15462 0.31549 0.085675 60995.0 2025 11 16 320 0.15285 0.31543 0.085007 60996.0 2025 11 17 321 0.15131 0.31531 0.084462 60997.0 2025 11 18 322 0.14992 0.31516 0.084078 60998.0 2025 11 19 323 0.14860 0.31500 0.083889 60999.0 2025 11 20 324 0.14729 0.31490 0.083929 61000.0 2025 11 21 325 0.14600 0.31484 0.084168 61001.0 2025 11 22 326 0.14475 0.31483 0.084537 61002.0 2025 11 23 327 0.14352 0.31484 0.084940 61003.0 2025 11 24 328 0.14230 0.31489 0.085306