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:
61278.0 2026 8 26 238 0.21338 0.34360 0.006890 61279.0 2026 8 27 239 0.21300 0.34243 0.006487 61280.0 2026 8 28 240 0.21281 0.34142 0.005905 61281.0 2026 8 29 241 0.21250 0.34060 0.005076 61282.0 2026 8 30 242 0.21207 0.33996 0.004165 61283.0 2026 8 31 243 0.21147 0.33955 0.003271 61284.0 2026 9 1 244 0.21080 0.33933 0.002419 61285.0 2026 9 2 245 0.20990 0.33909 0.001721 61286.0 2026 9 3 246 0.20869 0.33860 0.001226 61287.0 2026 9 4 247 0.20716 0.33803 0.000913 61288.0 2026 9 5 248 0.20581 0.33720 0.000704 61289.0 2026 9 6 249 0.20440 0.33638 0.000515 61290.0 2026 9 7 250 0.20320 0.33553 0.000198 61291.0 2026 9 8 251 0.20218 0.33469 -0.000353 61292.0 2026 9 9 252 0.20131 0.33393 -0.001182 61293.0 2026 9 10 253 0.20051 0.33322 -0.002283 61294.0 2026 9 11 254 0.19970 0.33256 -0.003579 61295.0 2026 9 12 255 0.19882 0.33195 -0.004940 61296.0 2026 9 13 256 0.19790 0.33136 -0.006237 61297.0 2026 9 14 257 0.19695 0.33078 -0.007365 61298.0 2026 9 15 258 0.19595 0.33019 -0.008276