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:
60816.0 2025 5 21 141 0.10515 0.43286 0.030424 60817.0 2025 5 22 142 0.10626 0.43376 0.029956 60818.0 2025 5 23 143 0.10732 0.43463 0.029289 60819.0 2025 5 24 144 0.10806 0.43560 0.028541 60820.0 2025 5 25 145 0.10863 0.43641 0.027885 60821.0 2025 5 26 146 0.10960 0.43688 0.027506 60822.0 2025 5 27 147 0.11064 0.43726 0.027459 60823.0 2025 5 28 148 0.11130 0.43764 0.027699 60824.0 2025 5 29 149 0.11164 0.43795 0.028100 60825.0 2025 5 30 150 0.11193 0.43764 0.028472 60826.0 2025 5 31 151 0.11273 0.43759 0.028736 60827.0 2025 6 1 152 0.11368 0.43713 0.028855 60828.0 2025 6 2 153 0.11485 0.43685 0.028832 60829.0 2025 6 3 154 0.11618 0.43676 0.028710 60830.0 2025 6 4 155 0.11755 0.43683 0.028551 60831.0 2025 6 5 156 0.11892 0.43701 0.028406 60832.0 2025 6 6 157 0.12027 0.43723 0.028325 60833.0 2025 6 7 158 0.12159 0.43747 0.028369 60834.0 2025 6 8 159 0.12291 0.43770 0.028587 60835.0 2025 6 9 160 0.12424 0.43790 0.029006 60836.0 2025 6 10 161 0.12558 0.43808 0.029603