Other
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4353m&link_type=abstract
HST Proposal ID #4353
Other
Hst Proposal Id #4353
Scientific paper
Ultraviolet and visible disk-resolved images of Io are requested in cycle 3. The highest-priority goal is to obtain complete surface coverage of Io at ~2300 and 2600A for the purpose of determining the abundance and distribution of both surface and atmospheric constituents, especially sulfur dioxide (SO2). Images at 2600A will spectrally resolve the SO2 component to as great a degree as possible, while images at 2300A have been specifically chosen to aid in interpretation of spectroscopic measurements by dis- entangling the competing optical effects due to surface SO2 frost and possible patchy regions of thick atmospheric SO2 gas. These will also be used to search for evidence of recent or ongoing volcanic outburts such as active plumes on the limb or new surface patterns, or other significant long-term changes in surface albedo since the Voyager disk-resolved images in 1979. A critical component of the proposed program is the request for visible images in bandpasses as closely matching those of the Voyager UV and visible filters as possible, which will provide critical information about the relative calibration required to make quantitative comparisons. Our results will be made available to the Galileo team members for possible help in misson planning.
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