Other
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..577b&link_type=abstract
Geophysical Research Letters, vol. 3, Oct. 1976, p. 577-580. Research sponsored by the Kitt Peak National Observatory;
Other
58
Atmospheric Composition, Mariner 10 Space Probe, Mercury (Planet), Mercury Atmosphere, Planetary Atmospheres, Gas Density, Helium, Hydrogen, Vertical Distribution
Scientific paper
Reduction of data from the three Mariner 10 encounters to this date have allowed identification of helium and hydrogen as atmospheric constituents. Subsolar point densities are estimated at 4500 per cu cm for He and 8 per cu cm for the thermal component of H. A nonthermal component in H with a scale height of about 70 km has been observed near the limb off the subsolar point, providing a total apparent number density of 90 per cu cm. Upper limits on other atmospheric constituents have been reduced an order of magnitude. A very tentative identification of O has been obtained but the uncertainty is large and we require further data reduction for confirmation.
Broadfoot Lyle A.
Kumar Sanjeev
Shemansky Don E.
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