Observatory data processing operations at the British Geological Survey

Reay, Sarah; Baillie, Orsi; Clarke, Ellen; Humphries, Thomas; Williamson, John. 2015 Observatory data processing operations at the British Geological Survey. [Speech] In: IUGG 26th General Assembly, Prague, Czech Republic, 22 June - 2 July 2015. (Unpublished)

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The British Geological Survey (BGS) operate seven magnetic observatories; three in the United Kingdom and four at remote locations worldwide. All seven are now INTERMAGNET Magnetic Observatories or IMOs. BGS also help to operate two other worldwide observatories on behalf of a directional drilling company. The processing of all nine observatories is carried out in the BGS office in Edinburgh, where rigorous quality-control operations are in place to ensure the quality of data and products. This is considered in relation to the real-time supply as well as next day delivery of quasi-definitive and longer term definitive data products. The data processing operations carried out on daily, weekly and annual time-scales are described, and the current practice is demonstrated. A single observatory system includes a fluxgate magnetometer - to measure variations in two perpendicular horizontal components and in the vertical component - and a proton precession magnetometer to measure absolute total field values. A fluxgate-theodolite is also required to enable weekly manual observations of declination and inclination, which supplement the other continuous and automatic measurements as per standard observatory operations. We compare processing techniques used for single-system observatories, which are in place at the seven remote locations, with those possible at the three UK observatories, where three systems are run in parallel. We describe the data correction processes that are used and the differences between those applied to one-second and one-minute values. Various sets of results are presented and some examples of their usefulness for scientific research discussed.

Item Type: Publication - Conference Item (Speech)
NORA Subject Terms: Earth Sciences
Data and Information
Date made live: 06 Jul 2015 12:50 +0 (UTC)

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