Other
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975kosis..13....3s&link_type=abstract
(Kosmicheskie Issledovaniia, vol. 13, Jan.-Feb. 1975, p. 3-8.) Cosmic Research, vol. 13, no. 1, July 1975, p. 1-6. Translation.
Other
1
Mars Atmosphere, Mars Landing, Mars Probes, Planetary Composition, Atmospheric Composition, Mars Surface, Planetary Mapping, Planetary Temperature, U.S.S.R. Space Program
Scientific paper
Mars 4, 5, 6, and 7 reached Mars in early 1974. Observations of the planet Mars were made from a flyby trajectory (Mars 4), from orbit (Mars 5), and from a successful lander (Mars 6). The lander made direct measurements of the atmospheric composition, pressure, and temperature. It was found that 35 plus or minus 15% of the Martian atmosphere consists of inert gases (probably argon). The lander data are consistent with a model for which the surface pressure is 6 mbar, the surface atmospheric temperature is 230 K, the temperature gradient in the tropopause is 2.5 K/km, the altitude of the tropopause is 25-30 km, and the temperature of the isothermic stratosphere is 150-160 K. The orbiter experiments studied the chemical composition of the atmosphere, the properties of the surface (including photometric and polarimetric studies), the interplanetary plasma, the magnetic field near Mars, and solar cosmic rays.
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