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Publisher
- edp sciences72
- iop publishing50
- spie50
- american astronomical society40
- uppsala universitet, institutet for rymdfysik, uppsalaavdelningen19
- arxiv18
- italian space agcy, via politecn snc, i-00133 rome, italy.17
- nasa, washington, dc 20546 usa.17
- univ alabama, ctr space plasma & aeron res, huntsville, al 35805 usa.;univ alabama, dept space sci, huntsville, al 35805 usa.17