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Review and outlook of solar energetic particle measurements on multispacecraft missions

Reames, Donald V.

The earliest evidence of spatial distributions of solar energetic particles (SEPs) compared events from many different source longitudes on the Sun, but the early Pioneers provided the first evidence of the large areas of equal SEP intensities across the magnetically confined "reservoirs" late in the events. More detailed measurements of the impor…

The basic solar wind speed distribution and its sunspot cycle variations

Akasofu, Syun-Ichi; Lee, Lou-Chuang

In this paper, it is suggested that the latitudinal solar wind speed observed by the Ulysses spacecraft during the lowest solar activity (when both the ecliptic and magnetic equators coincide) may be identified as the basic speed distribution throughout the solar cycle. We demonstrate this suggestion by rotating this particular Ulysses distributio…