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Source: Astronomy & Geophysics, Volume 48, Number 6, December 2007, pp. 6.11-6.17(1)
Document Type: Research Article
Affiliations: 1: School of Physics and Astronomy, Southampton University, and Space Science and Technology Dept, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire. 2: Space Science and Technology Dept, Rutherford Appleton Laboratory.
Publication date: December 1, 2007