Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stin...9523560.&link_type=abstract
Final Report Southwest Research Inst., San Antonio, TX. Instrumentation and Space Research Division.
Astronomy and Astrophysics
Astronomy
Atmospheric Composition, Charon, Hyperion, Iue, Jupiter Satellites, Light Curve, Pluto (Planet), Titania, Ultraviolet Astronomy, Ultraviolet Spectra, Venus (Planet), Venus Atmosphere, Asteroids, Data Reduction, Pioneer Venus Spacecraft, Saturn Rings, Spaceborne Astronomy, Sulfur Dioxides, Surface Properties, Venus Surface
Scientific paper
The data reduction and analysis of IUE observations were completed. These results were presented from Venus SO2 (of the VEOEB program). The three IUE observing programs were NSOSS, VEOEB, and PCOEB. NSOSS consisted of comparative UV studies. The objectives of NSOSS included: making the first UV observations of 4179 Toutatis (a near-Earth asteroid), Himalia (a satellite of Jupiter), and Hyperion (the Saturnian satellite); obtaining the first radially-dependent information on the UV color of Saturn's rings; gathering uncontaminated UV spectra of Iapetus's bright and dark hemispheres; and obtaining a spectrum of Titania to initiate the comparative study of UV photometric properties in the Uranian system. VEOEB, as stated above, was a study of the SO2 of the Venus atmosphere and surface. Based on past Pioneer Venus and IUE observations, significant SO2 variations have been interpreted as indicating that the long term atmospheric SO2 abundance may be related to large, episodic infections from the surface or interior of Venus. If episodic events occur, then continuing observations of SO2 in the Venus atmosphere play a vital role in understanding Venus's current and past geologic evolution. PCOEB was a study of the Pluto-Charon system. The primary objective of PCOEB was to complete the coverage of the system's UV light curve in order to analyze the surface properties of Pluto-Charon. Publications, abstracts and articles, resulting from this grant are appended to this report.
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