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Coplan, M.A.; Ogilvie, K.W.; Geiss, J.
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center1983
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center1983
AbstractAbstract
[en] The ion composition instrument (ICI) on ISEE-3 observed the isotopes of helium of mass 3 and 4 in the solar wind almost continuously between August 1978 and July 1982. This period included the increase towards the maximum of solar activity cycle 21, the maximum period, and the beginning of the descent towards solar minimum. Observations were made when the solar wind speed was between 300 and 620 km/s. For part of the period evidence for regular interplanetary magnetic sector structure was clear and a number of 3He flares occurred during this time
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Jun 1983; 45 p; NASA-TM--85049; Available from NTIS, PC A03/MF A01
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