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:
61258.0 2026 8 6 218 0.22286 0.36079 0.010600 61259.0 2026 8 7 219 0.22311 0.36005 0.010528 61260.0 2026 8 8 220 0.22347 0.35954 0.010739 61261.0 2026 8 9 221 0.22359 0.35917 0.011086 61262.0 2026 8 10 222 0.22325 0.35865 0.011459 61263.0 2026 8 11 223 0.22286 0.35786 0.011729 61264.0 2026 8 12 224 0.22282 0.35702 0.011617 61265.0 2026 8 13 225 0.22297 0.35617 0.011150 61266.0 2026 8 14 226 0.22309 0.35517 0.010379 61267.0 2026 8 15 227 0.22317 0.35416 0.009475 61268.0 2026 8 16 228 0.22318 0.35320 0.008646 61269.0 2026 8 17 229 0.22304 0.35233 0.007983 61270.0 2026 8 18 230 0.22280 0.35141 0.007534 61271.0 2026 8 19 231 0.22252 0.35049 0.007313 61272.0 2026 8 20 232 0.22223 0.34958 0.007298 61273.0 2026 8 21 233 0.22194 0.34867 0.007458 61274.0 2026 8 22 234 0.22162 0.34775 0.007745 61275.0 2026 8 23 235 0.22127 0.34684 0.008082 61276.0 2026 8 24 236 0.22089 0.34591 0.008371 61277.0 2026 8 25 237 0.22050 0.34497 0.008517 61278.0 2026 8 26 238 0.22008 0.34401 0.008459