Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p42a0556i&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P42A-0556
Physics
5462 Polar Regions, 5464 Remote Sensing, 5494 Instruments And Techniques, 6225 Mars
Scientific paper
We present analysis of the radiometric data received by the Mars Orbiter Laser Altimter (MOLA) (Abshire et al.) and its correlations with the Thermal Emission Spectrometer (TES) Lambert Albedo (Christensen et al.). Radiometry data is acquired along with the regular topography data. It is also possible to obtain radiometry data independently of the range measurment. MOLA as a radiometer operates at the wavelength of 1.064 micron with a bandwidth of 2 nm and measures reflected solar radiation from the Martian surface and atmosphere. The surface footprint of MOLA radiometer sensor (as opposed to the laser beam footprint) is 300m from MGS orbit. TES has a solar reflectance sensor, which measures radiance in a single band from 0.3 to 3 micron and, hence covers significantly wider band than the MOLA radiometer. The surface footprint of one sensor is 3km from MGS orbit. The preliminary analysis of radiometry data indicates that it is well calibrated and exhibits good correlation with surface albedo features and atmospheric phenomena (water ice clouds, dust storms). We present and discuss quantative analysis of the MOLA radiometry data and its correlations with the TES Lambert Albedo measurement. The analysis includes the results of comparison of MOLA radiometry data with planet-wide TES albedo distribution during a clear season, when atmospheric scattering is minimized; comparison with the albedo derived from MOLA reflectivity; analysis of the data from the polar regions and analysis of the off-nadir data. References. Abshire, J. A., et al, General description of the MOLA radiometry measurment, ibid, 2001 Christensen, P. R., et al, Results from the Mars global surveyor thermal emission spectrometer, Science, 279(5357), pp. 1692-1698, 1998
Ivanov Boris A.
Muhleman Duane O.
Neumann Gregory A.
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