Photometry of bright regions on Mars - ISM results

Details Photometry of bright regions on Mars - ISM results Photometry of bright regions on Mars - ISM results

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..729k&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 729.

Astronomy and Astrophysics

Astronomy

1

Astronomical Photometry, Mars Surface, Spectral Reflectance, Incidence, Aerosols

Scientific paper

Compositional interpretations of reflection spectra depend on changes in spectral band positions, albedo, and continuum slope. Spectra of bright regions on Mars (0.77-3.14 microns) show that surface effects cause the measured reflectance to decrease as incidence, emission or phase angle increases. Aerosols make the continuum slope more negative and shift band centers to a longer wavelength with increasing emission angle. To normalize the data to a common viewing geometry, first the reflectance is corrected for phase angle and opposition effects, then a Minnaert function corrects for varying incidence and emission angles, and finally the increase in reflectance with emission angle caused by aerosols is subtracted from the spectra. The result allows spectra measured at different viewing geometries to be more accurately compared.

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