Computer Science
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6024m&link_type=abstract
HST Proposal ID #6024
Computer Science
Hst Proposal Id #6024 Solar System
Scientific paper
Observations are proposed using the High Resolution Spectrograph to accurately measure the far-ultraviolet (~1175-1525Angstrom) spectrum of Titan at ~2Angstrom resolution, which has been observed previously only by the Voyager Ultraviolet Spectrometer at very low spectral resolution (~30Angstrom). Models of the bright emissions from atomic and molecular nitrogen and N+ in the Voyager data provide poor fits longward of ~ 1000Angstrom. In addition, several unidentified emissions remain which cannot be explained by N+ or its dissociation products, including a strong feature at ~1336Angstrom. Positive identifications of these emissions will help determine the relative contributions by magnetospheric particle precipitation, photoelectrons, and direct solar excitation to the observed UV dayglow, and will allow comparison with UV observations of the Earth's airglow and aurora. The proposed observations will therefore address several principal scientific objectives for Titan: the investigation of the upper atmosphere, its interaction with Saturn's magnetosphere and the solar wind, and its role as a source of neutral and ionized material to the magnetosphere.
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