| Affiliation: |
| AA(Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Drive #0424, La Jolla, CA 92093-0424, USA ), AB(Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, Penglais Campus, Aberystwyth, SY23 3BZ United Kingdom ), AC(Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, Penglais Campus, Aberystwyth, SY23 3BZ United Kingdom ), AD(Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, Penglais Campus, Aberystwyth, SY23 3BZ United Kingdom ), AE(Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, Penglais Campus, Aberystwyth, SY23 3BZ United Kingdom ), AF(EISCAT Scientific Association, P.O. Box 164, Kiruna, SE-981 23 Sweden ), AG(Jodrell Bank Observatory, School of Physics and Astronomy, University of Manchester, Macclesfield, Cheshire, SK11 9DL United Kingdom ), AH(Jodrell Bank Observatory, School of Physics and Astronomy, University of Manchester, Macclesfield, Cheshire, SK11 9DL United Kingdom ) |