Other
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8377s&link_type=abstract
HST Proposal ID #8377
Other
Hst Proposal Id #8377 Solar System
Scientific paper
We propose to use archived HST images of Jupiter, made before and after the December 1995 Galileo Probe in-situ observations, to investigate cloud structure in and adjacent to the probe entry point and in similar regions at other locations. Prior analyses of Jovian cloud structure, having limited constraints to apply to an underdetermined problem, made assumptions such as semi-infinite clouds, equality of single scattering albedos for upper and lower clouds, uniform phase functions for all wavelengths, and specific cloud base locations. We propose to use new constraints on cloud properties and abundance of condensible species provided by the Galileo Nephelometer, Net Flux Radiometer, and Mass Spectrometer, to reduce the solution space for interpreting remote observations. The primary HST inputs into the proposed analysis will be the wavelength-dependent albedo and limb darkening characteristics of hot spot regions and their surroundings, using WFPC2 and NICMOS imaging from UV to 2.3 microns, with varying Rayleigh scattering and gas absorption as probes of vertical structure, and continuum wavelengths as a probe of particle properties. We will also use several Galileo orbiter images to help constrain heterogeneous and vertical structure using the intermediate methane absorption band at 7270Angstrom .
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