TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 65 (No. 11), pp. 1355-1362, 2013

Observatory data and the Swarm mission

S. Macmillan1 and N. Olsen2

1British Geological Survey, Murchison House, Edinburgh, EH9 3LA, U.K.
2Technical University of Denmark, Elektrovej, 2800 Kgs. Lyngby, Denmark

(Received January 14, 2013; Revised July 2, 2013; Accepted July 29, 2013; Online published November 22, 2013)

Abstract: The ESA Swarm mission to identify and measure very accurately the different magnetic signals that arise in the Earth's core, mantle, crust, oceans, ionosphere and magnetosphere, which together form the magnetic field around the Earth, has increased interest in magnetic data collected on the surface of the Earth at observatories. The scientific use of Swarm data and Swarm-derived products is greatly enhanced by combination with observatory data and indices. As part of the Swarm Level-2 data activities plans are in place to distribute such ground-based data along with the Swarm data as auxiliary data products. We describe here the preparation of the data set of ground observatory hourly mean values, including procedures to check and select observatory data spanning the modern magnetic survey satellite era. We discuss other possible combined uses of satellite and observatory data, in particular those that may use higher cadence 1-second and 1-minute data from observatories.
Key words: Magnetic survey satellites, geomagnetic observatory data.

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

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