TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 65 (No. 11), pp. 1345-1353, 2013

Independent validation of Swarm Level 2 magnetic field products and `Quick Look' for Level 1b data

Ciarán D. Beggan, Susan Macmillan, Brian Hamilton, and Alan W. P. Thomson

British Geological Survey, Murchison House, Edinburgh, EH9 3LA U.K.

(Received December 19, 2012; Revised August 14, 2013; Accepted August 21, 2013; Online published November 22, 2013)

Abstract: Magnetic field models are produced on behalf of the European Space Agency (ESA) by an independent scientific consortium known as the Swarm Satellite Constellation Application and Research Facility (SCARF), through the Level 2 Processor (L2PS). The consortium primarily produces magnetic field models for the core, lithosphere, ionosphere and magnetosphere. Typically, for each magnetic product, two magnetic field models are produced in separate chains using complementary data selection and processing techniques. Hence, the magnetic field models from the complementary processing chains will be similar but not identical. The final step in the overall L2PS therefore involves inspection and validation of the magnetic field models against each other and against data from (semi-) independent sources (e.g. ground observatories). We describe the validation steps for each magnetic field product and the comparison against independent datasets, and we show examples of the output of the validation. In addition, the L2PS also produces a daily set of `Quick Look' output graphics and statistics to monitor the overall quality of Level 1b data issued by ESA. We describe the outputs of the `Quick Look' chain.
Key words: Swarm, validation, quick look, magnetic modelling.

Corresponding author E-mail: ciar@bgs.ac.uk

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