Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...45..577f&link_type=abstract
Icarus, vol. 45, Mar. 1981, p. 577-585.
Astronomy and Astrophysics
Astronomy
7
Electrophotometry, Mars Atmosphere, Planetary Structure, Stellar Occultation, Upper Atmosphere, Atmospheric Models, Atmospheric Tides, Light Curve, Oblate Spheroids, Mars, Occultations, Atmosphere, Oblateness, Photoelectric Observations, Thermal Gradients, Altitude, Light Curve, Comparisons, Astrometry, Data, Procedure
Scientific paper
The oblateness of the Martian upper atmosphere was determined from analysis of photoelectric observations of the April 8, 1976 occultation of Epsilon Geminorum by Mars at seven stations. The oblateness is 0.0096 + or - 0.0023, consistent with a mean equator-to-pole temperature difference in excess of approximately 50 K, vertically averaged from the surface to the occultation altitude of approximately 70 km. The astrometric solution provides a precise determination of the occultation path relative to the Martian shadow, and an absolute vertical alignment of upper atmospheric temperature profiles obtained by the inversion of occultation light curves. The observations can be compared directly with models of the atmospheric tides computed for the conditions at the suboccultation regions on Mars.
French Richard G.
Taylor Gordon E.
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