Spectroscopy and Polarimetry of Mars at Closest Approach

Details Spectroscopy and Polarimetry of Mars at Closest Approach Spectroscopy and Polarimetry of Mars at Closest Approach

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9738b&link_type=abstract

HST Proposal ID #9738

Physics

Hst Proposal Id #9738 Solar System

Scientific paper

We plan a coordinated program of spectroscopy, imaging, and spectropolarimetry of Mars during the August 2003 opposition to study the composition and physical state of surface materials and airborne aerosols. The observations include {a} Moderate spectral resolution 290 to 570 nm STIS long-slit push-broom imaging spectroscopy of Mars, to constrain the properties of airborne aerosol particles and to search for and globally map iron-bearing minerals that are diagnostic of specific past climatic conditions; {b} WFPC2 UV-VIS images designed primarily to quantify the effects of ice and dust aerosols on our STIS spectra; {c} NICMOS near-IR images to search for and globally map the presence of hydrated surface minerals; and {d} ACS multispectral polarizer images to provide critical phase function measurements needed to constrain the physical properties of the Martian surface layer. The observations are timed to take advantage of the closest approach of Mars to Earth for the next several hundred years. Images and spectra will be acquired at a spatial scale comparable to existing spacecraft orbital spectroscopy data { 10 km/pixel} and in wavelength regions not sampled by past or current Mars spacecraft instrumentation. These observations also provide complementary scientific and calibration measurements in support of current and future NASA and ESA Mars exploration missions.

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