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:
61025.0 2025 12 16 350 0.11896 0.31800 0.074836 61026.0 2025 12 17 351 0.11760 0.31819 0.074923 61027.0 2025 12 18 352 0.11645 0.31826 0.075201 61028.0 2025 12 19 353 0.11517 0.31849 0.075680 61029.0 2025 12 20 354 0.11374 0.31893 0.076212 61030.0 2025 12 21 355 0.11285 0.31949 0.076785 61031.0 2025 12 22 356 0.11223 0.32034 0.077279 61032.0 2025 12 23 357 0.11132 0.32119 0.077548 61033.0 2025 12 24 358 0.11030 0.32190 0.077600 61034.0 2025 12 25 359 0.10913 0.32269 0.077361 61035.0 2025 12 26 360 0.10801 0.32324 0.076850 61036.0 2025 12 27 361 0.10677 0.32382 0.076166 61037.0 2025 12 28 362 0.10561 0.32439 0.075455 61038.0 2025 12 29 363 0.10454 0.32497 0.074841 61039.0 2025 12 30 364 0.10354 0.32554 0.074403 61040.0 2025 12 31 365 0.10260 0.32613 0.074190 61041.0 2026 1 1 1 0.10166 0.32677 0.074216 61042.0 2026 1 2 2 0.10073 0.32741 0.074436 61043.0 2026 1 3 3 0.09983 0.32808 0.074732 61044.0 2026 1 4 4 0.09893 0.32877 0.074980 61045.0 2026 1 5 5 0.09803 0.32947 0.075045