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:
61300.0 2026 9 17 260 0.19005 0.32910 -0.008583 61301.0 2026 9 18 261 0.18904 0.32915 -0.008985 61302.0 2026 9 19 262 0.18765 0.32926 -0.009466 61303.0 2026 9 20 263 0.18621 0.32906 -0.009984 61304.0 2026 9 21 264 0.18501 0.32860 -0.010630 61305.0 2026 9 22 265 0.18376 0.32816 -0.011409 61306.0 2026 9 23 266 0.18247 0.32769 -0.012347 61307.0 2026 9 24 267 0.18150 0.32728 -0.013484 61308.0 2026 9 25 268 0.18080 0.32698 -0.014839 61309.0 2026 9 26 269 0.18003 0.32665 -0.016339 61310.0 2026 9 27 270 0.17917 0.32636 -0.017912 61311.0 2026 9 28 271 0.17824 0.32602 -0.019411 61312.0 2026 9 29 272 0.17728 0.32574 -0.020719 61313.0 2026 9 30 273 0.17624 0.32544 -0.021769 61314.0 2026 10 1 274 0.17517 0.32515 -0.022546 61315.0 2026 10 2 275 0.17413 0.32488 -0.023103 61316.0 2026 10 3 276 0.17311 0.32460 -0.023553 61317.0 2026 10 4 277 0.17208 0.32433 -0.024050 61318.0 2026 10 5 278 0.17104 0.32406 -0.024733 61319.0 2026 10 6 279 0.17001 0.32382 -0.025706 61320.0 2026 10 7 280 0.16900 0.32358 -0.026981