Other
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8152b&link_type=abstract
HST Proposal ID #8152
Other
Hst Proposal Id #8152 Solar System
Scientific paper
We propose to perform high spatial resolution and moderate spectral resolution 5500Angstrom to 10000Angstrom STIS long-slit imaging spectroscopy of Mars, in order to identify and globally map the planet's iron-bearing surface mineralogy. STIS measurements would be obtained by push-broom scanning the 0.2 " slit entirely across the planet during each of four separate "visits" spaced 6 hours apart over the course of a single Martian day. These hyperspectral STIS image cubes will be complemented by near-simultaneous WFPC2 UV-VIS imaging that will allow us to quantify the effects of water ice clouds or other aerosols on our STIS spectra. These data will be used to search for and globally map spectral signatures of climatically-diagnostic ferric and ferrous minerals at a spatial scale comparable to existing spacecraft orbital spectroscopy data { 20 km/pixel} and in a wavelength region not well spectrally-sampled by existing or planned Mars spacecraft instrumentation. A secondary objective of these observations is to provide unique new scientific and calibration measurements in support of four NASA Mars exploration missions. We require these observations to be scheduled near 0degrees phase angle at opposition {24 April 1999} in order to study this poorly explored part of the Martian phase curve and to maximize the spatial resolution.
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