Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.5202g&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #52.02; Bulletin of the American Astronomical Society, Vol. 24, p.815
Astronomy and Astrophysics
Astrophysics
Scientific paper
An ultraviolet coronagraph (UVC) is being prepared for a series of orbital flights on NASA's Spartan 201 which is deployed and retrieved by Shuttle. The Spartan 201 payload consists of the UVC and a white light coronagraph developed by the High Altitude Observatory. Spartan is expected to provide 26 orbits of solar observations per flight. The first flight is scheduled for May 1993 and subsequent flights are planned to occur at each polar passage of Ulysses (1994 and 1995). The UVC measures the intensity and spectral line profile of resonantly scattered H I Ly-alpha and the intensities of O VI lambda 1032 and lambda 1037 at heliocentric heights between 1.3 and 3.5 solar radii. A description of the UVC instrument, its characteristics, and the observing program for the first flight will be presented. The initial scientific objective is to determine the random velocity distribution and bulk outflow velocity of coronal protons and the density and outflow velocity of O(5+) in polar coronal holes and adjoining high latitude streamers. This work is supported by NASA under Grant No. NAG5-613 to the Smithsonian Astrophysical Observatory.
Esser Ruth
Fineschi Silvano
Gardner Larry D.
Hassler Donald M.
Kohl John L.
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