Surface and Near-Surface Atmospheric Temperatures for the Mars Exploration Rover Landing Sites

Details Surface and Near-Surface Atmospheric Temperatures for the Mars Exploration Rover Landing Sites Surface and Near-Surface Atmospheric Temperatures for the Mars Exploration Rover Landing Sites

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.3806s&link_type=abstract

American Astronomical Society, DPS meeting #36, #38.06; Bulletin of the American Astronomical Society, Vol. 36, p.1161

Astronomy and Astrophysics

Astronomy

Scientific paper

Downward looking surface spectra from the Miniature Thermal Emission Spectrometer (Mini-TES), onboard each of the two Mars Exploration Rovers, are modeled in order to extract surface and near-surface atmospheric temperatures. By fitting the observed radiance in the vicinity of the 15-micron CO2 absorption feature, the surface temperature and the near-surface atmospheric temperature, approximately 110 cm above the surface, are determined. These temperatures from all sols are combined to create a diurnal temperature curve. This curve shows near-surface atmospheric temperatures consistently 20 K cooler than the surface temperatures in the warmest part of each sol (Martian day), which is between 13h00-14h00 LST depending on the landing site. Seasonal cooling trends are seen in the data by displaying the temperatures as a function of sol over the first 180 sols of each mission. In addition, long ground stares (8.5 minutes in duration) show as much as 8 K fluctuations in the near-surface atmospheric temperatures during the early afternoon hours when the atmosphere is unstable.

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