Using a Superconducting Gravimeter in Support of Absolute Gravity Campaigning — A Feasibility Study
Hans-Georg Scherneck , Marcin Rajner
AbstractPreparing for joint analysis of absolute gravity (AG) campaigns, this report investigates whether a stationary superconducting gravimeter (SCG) can provide a long-term stable measurement of sitedependent perturbations that help in reduction to the local value of little-g and its secular rate of change. The crucial element concerns the discrimination of instrumental drift components from trends of physical origin, where biasses in the inferred long-term drift rate may offset the rate that the reduced AG campaigns deliver. Thus, the main objective is to include a set of gravity models and proxy series as complete as possible in the SCG analysis. Findings indicate consistency for ݃ሶ in the drift model at the 0.5 nm/s2 /yr level using observations at Onsala Space Observatory from 2009 to 2017. In pursuit of the overriding objective to improve the accuracy of secular rates of gravity owed to Glacial Isostatic Adjustment, our approach may even put numbers on a range of long-term changes due to atmosphere, hydrology, and non-tidal ocean loading, namely the rate biasses reported here.
|Journal series||Geophysica, ISSN 0367-4231, e-ISSN 2324-0741, (N/A 20 pkt)|
|Publication size in sheets||0.9|
|Keywords in English||Gravity change, Glacial Isostatic Rebound, Superconducting Gravimeter, absolute gravimeter|
|Score||= 20.0, 17-11-2019, ArticleFromJournal|
|Publication indicators||: 2018 = 0.367|
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