Abstract
In 1974 a number of observations of the magnetic field at about 1 AU were already available and the concept of coronal magnetic field expansion in the heliosphere well established. On the other hand, only a few, sporadic, in situ field observations were available at heliocentric distances significantly inside the terrestrial orbit.
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Mariani, F., Neubauer, F.M. (1990). The Interplanetary Magnetic Field. In: Schwenn, R., Marsch, E. (eds) Physics of the Inner Heliosphere I. Physics and Chemistry in Space, Space and Solar Phycics, vol 20. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75361-9_4
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DOI: https://doi.org/10.1007/978-3-642-75361-9_4
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