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Fig. 4

image

Histogram of the occurrence percentage of the cone angle θc. Top panel: values for all RPC MAG data (blue) and for high-field Bm ≥ 10 nT data (red). The two vertical lines show the estimated Parker spiral values θ ≈ 60° for Rosetta at ~2.7 AU. Bottom panel: values for the OMNI data.

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