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Ulysses solar wind plasma observations from peak southerly latitude through perihelion and beyondThe Ulysses spacecraft trajectory includes a peak southern latitude of -80.2 deg, reached during September 1994, and perihelion in the ecliptic plane at 134 AU in March 1995. The near-perihelion mission phase features a rapid scan through solar latitude, with rates approaching one degree per day. We will present observations through mid-May 1995, when the spacecraft will be near 1.5 AU and +50 deg solar latitude. At the time of this writing, observations from the solar wind plasma experiment have been examined through -40 deg solar latitude. At that latitude Ulysses was still immersed in fast solar wind from the south polar coronal hole, with wind speeds of 700 to 800 km/s and with a variety of fine structure. Expectations for near-perihelion measurements include times of slow, dense wind characteristic of the near-equatorial heliomagnetic streamer belt. A non-zero tilt of the streamer belt would produce recurrent intervals of fast coronal hole wind and corotating interaction regions (CIRs) caused by fast wind overtaking slow wind. Forward and reverse shock waves bounding the CIRs, routinely observed at low and intermediate latitudes beyond approximately 2 AU, will likely be absent during the northward transit due to proximity to the Sun we will summarize solar wind plasma results concerning meridional gradients in fluid parameters, large-scale and fine structure, and transient events such as coronal mass ejections.
Document ID
19960021305
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Phillips, J. L.
(Los Alamos National Lab. NM United States)
Bame, S. J.
(Los Alamos National Lab. NM United States)
Feldman, W. C.
(Los Alamos National Lab. NM United States)
Gosling, J. T.
(Los Alamos National Lab. NM United States)
Hammond, C. M.
(Los Alamos National Lab. NM United States)
McComas, D. J.
(Los Alamos National Lab. NM United States)
Goldstein, B. E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Neugebauer, M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Publication Information
Publication: International Solar Wind 8 Conference
Subject Category
Solar Physics
Accession Number
96N24701
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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