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:
60793.0 2025 4 28 118 0.08339 0.41423 0.030048 60794.0 2025 4 29 119 0.08410 0.41513 0.029646 60795.0 2025 4 30 120 0.08471 0.41605 0.029569 60796.0 2025 5 1 121 0.08549 0.41693 0.029782 60797.0 2025 5 2 122 0.08649 0.41800 0.030085 60798.0 2025 5 3 123 0.08737 0.41913 0.030280 60799.0 2025 5 4 124 0.08815 0.42019 0.030329 60800.0 2025 5 5 125 0.08888 0.42119 0.030262 60801.0 2025 5 6 126 0.08972 0.42215 0.030059 60802.0 2025 5 7 127 0.09067 0.42327 0.029758 60803.0 2025 5 8 128 0.09163 0.42418 0.029416 60804.0 2025 5 9 129 0.09264 0.42519 0.029098 60805.0 2025 5 10 130 0.09370 0.42612 0.028830 60806.0 2025 5 11 131 0.09480 0.42697 0.028631 60807.0 2025 5 12 132 0.09594 0.42776 0.028551 60808.0 2025 5 13 133 0.09713 0.42850 0.028639 60809.0 2025 5 14 134 0.09836 0.42920 0.028906 60810.0 2025 5 15 135 0.09961 0.42988 0.029322 60811.0 2025 5 16 136 0.10089 0.43052 0.029825 60812.0 2025 5 17 137 0.10219 0.43115 0.030347 60813.0 2025 5 18 138 0.10350 0.43175 0.030834