Fig. 1.
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Distribution of 100 MeV protons 1 h after injection from a 8° ×8° source at the solar equator at ϕ = 0°, integrated over latitude and binned in longitude and radius bins. The black curve shows the nominal Parker spiral originating from the centre of the source region. The magenta and cyan arcs at r = 1 au depict ranges for Δϕ < 0° and Δϕ > 0°, respectively (see Eq. (1)).
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