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:
60838.0 2025 6 12 163 0.12906 0.44282 0.031744 60839.0 2025 6 13 164 0.13071 0.44283 0.032728 60840.0 2025 6 14 165 0.13254 0.44264 0.033604 60841.0 2025 6 15 166 0.13470 0.44246 0.034279 60842.0 2025 6 16 167 0.13693 0.44254 0.034787 60843.0 2025 6 17 168 0.13887 0.44270 0.035077 60844.0 2025 6 18 169 0.14054 0.44292 0.035134 60845.0 2025 6 19 170 0.14203 0.44301 0.035047 60846.0 2025 6 20 171 0.14355 0.44277 0.034933 60847.0 2025 6 21 172 0.14518 0.44259 0.034929 60848.0 2025 6 22 173 0.14673 0.44231 0.035174 60849.0 2025 6 23 174 0.14826 0.44221 0.035785 60850.0 2025 6 24 175 0.14977 0.44209 0.036722 60851.0 2025 6 25 176 0.15124 0.44195 0.037860 60852.0 2025 6 26 177 0.15266 0.44177 0.039062 60853.0 2025 6 27 178 0.15407 0.44155 0.040202 60854.0 2025 6 28 179 0.15546 0.44131 0.041188 60855.0 2025 6 29 180 0.15685 0.44103 0.041983 60856.0 2025 6 30 181 0.15822 0.44073 0.042616 60857.0 2025 7 1 182 0.15959 0.44040 0.043139 60858.0 2025 7 2 183 0.16096 0.44005 0.043624