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:
60718.0 2025 2 12 43 0.08322 0.31232 0.047224 60719.0 2025 2 13 44 0.08285 0.31306 0.047078 60720.0 2025 2 14 45 0.08264 0.31400 0.046743 60721.0 2025 2 15 46 0.08234 0.31487 0.046297 60722.0 2025 2 16 47 0.08176 0.31579 0.045921 60723.0 2025 2 17 48 0.08100 0.31703 0.045608 60724.0 2025 2 18 49 0.07987 0.31811 0.045425 60725.0 2025 2 19 50 0.07861 0.31884 0.045431 60726.0 2025 2 20 51 0.07721 0.31955 0.045607 60727.0 2025 2 21 52 0.07569 0.32048 0.045927 60728.0 2025 2 22 53 0.07442 0.32121 0.046352 60729.0 2025 2 23 54 0.07321 0.32219 0.046837 60730.0 2025 2 24 55 0.07218 0.32318 0.047301 60731.0 2025 2 25 56 0.07130 0.32420 0.047634 60732.0 2025 2 26 57 0.07055 0.32525 0.047728 60733.0 2025 2 27 58 0.06989 0.32635 0.047517 60734.0 2025 2 28 59 0.06929 0.32748 0.046996 60735.0 2025 3 1 60 0.06874 0.32863 0.046229 60736.0 2025 3 2 61 0.06824 0.32980 0.045351 60737.0 2025 3 3 62 0.06776 0.33098 0.044517 60738.0 2025 3 4 63 0.06731 0.33216 0.043889