Other
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9052b&link_type=abstract
HST Proposal ID #9052
Other
Hst Proposal Id #9052 Solar System
Scientific paper
We propose to perform high spatial resolution and moderate spectral resolution 3000Angstrom to 5700Angstrom STIS long-slit imaging spectroscopy of Mars, to search for and globally map the presence of iron-bearing minerals that are diagnostic of specific climatic conditions. STIS measurements would be obtained by push-broom scanning the 0.2" slit across the planet during four separate visits spaced 90degrees apart in Martian longitude. 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 STIS data will provide the ability to detect and map small abundances { 1 jarosite K, Na, H_3OFe_3{SO_4}_2{OH}_6, goethite {AlphaFeOOH}, hematite {alphaFe_2O_3}, and other ferric and ferrous phases. These minerals are formed under specific environmental conditions, and some are potential sinks for Martian atmospheric volatiles. Our search will be conducted at a spatial scale comparable to existing spacecraft orbital spectroscopy data { 15-20 km/pixel} and in a wavelength region not sampled by existing or planned Mars spacecraft instrumentation. These observations also provide complementary measurements in support of current and future NASA Mars exploration missions. We require these observations to be scheduled near opposition {June-July 2001} in order to maximize spatial resolution.
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