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:
60899.0 2025 8 12 224 0.21832 0.41407 0.071997 60900.0 2025 8 13 225 0.21871 0.41314 0.072032 60901.0 2025 8 14 226 0.21894 0.41217 0.072140 60902.0 2025 8 15 227 0.21959 0.41109 0.072396 60903.0 2025 8 16 228 0.22052 0.41002 0.072843 60904.0 2025 8 17 229 0.22138 0.40892 0.073584 60905.0 2025 8 18 230 0.22225 0.40757 0.074524 60906.0 2025 8 19 231 0.22327 0.40604 0.075623 60907.0 2025 8 20 232 0.22452 0.40448 0.076760 60908.0 2025 8 21 233 0.22587 0.40309 0.077769 60909.0 2025 8 22 234 0.22698 0.40182 0.078579 60910.0 2025 8 23 235 0.22801 0.40067 0.079210 60911.0 2025 8 24 236 0.22883 0.39955 0.079686 60912.0 2025 8 25 237 0.22948 0.39839 0.080035 60913.0 2025 8 26 238 0.23001 0.39718 0.080318 60914.0 2025 8 27 239 0.23045 0.39591 0.080621 60915.0 2025 8 28 240 0.23086 0.39457 0.081020 60916.0 2025 8 29 241 0.23124 0.39319 0.081573 60917.0 2025 8 30 242 0.23159 0.39178 0.082299 60918.0 2025 8 31 243 0.23192 0.39037 0.083207 60919.0 2025 9 1 244 0.23222 0.38895 0.084271