Physics
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...37a&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 13, no. 6, p. 37-40.
Physics
10
Celestial Sphere, Galileo Spacecraft, Interplanetary Medium, Lyman Alpha Radiation, Solar Wind, Spaceborne Telescopes, Backscattering, Latitude
Scientific paper
The Galileo Ultraviolet Spectrometer Experiment (UVS) obtained a map of the celestial sphere from interplanetary Lyman-alpha (IPLA) on 13, 14 December 1990 during the Earth1 encounter. The Galileo spacecraft was near the downwind interstellar axis during the encounter and the map view directions filled the downwind hemisphere. The ratio between the observation and a single scattering model is attributed to a direct measurement of the multiple scattering correction required to model IPLA in the inner solar system. Analysis of this data set, referred to as an antisun map, shows that the solar wind charge exchange rate with interplanetary gas is 25 percent less over the solar poles than in the ecliptic at solar maximum. A model of the interstellar wind based on the antisun map observation exhibits a number density of atomic hydrogen far from the solar system, inside the heliosphere, of 0.16 +/- 0.05/cu cm.
Ajello Joseph M.
Barth Charles A.
Hord Charles W.
Pryor Wayne R.
Simmons Karen E.
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