Solar wind consequences of a coronal hole density profile: Spartan 201-03 Coronagraph and Ulysses observations from 0.15 R_⊙ TO 4 AU

摘要

Spartan 201 is a small shuttle-launched and -retrieved satellite, whose mission is to study the origins of the solar wind. It carries on board two instruments, the Ultraviolet Coronal Spectrometer and the White-Light Coronagraph. The third mission of the Spartan 201 (1995 September 7-10) spacecraft was to provide a solar Context for the in situ particles and fields measurements during the north polar passage of the Ulysses spacecraft. In this letter, we characterize the physical conditions to the north polar coronal hole as derived from white-light Coronal observations by the Spartan 201-03 White-Light Coronagraph, the ground-based K coronameter in Mauna Loa, Hawaii, and Ulysses observations of in situ particles and their velocity.