Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977kosis..15..255k&link_type=abstract
Kosmicheskie Issledovaniia, vol. 15, Mar.-Apr. 1977, p. 255-260. In Russian.
Astronomy and Astrophysics
Astronomy
Mars Atmosphere, Mars 5 Spacecraft, Planetary Radiation, Ultraviolet Photometry, Aerosols, Astronomical Photometry, Atmospheric Composition, Ozone, Spaceborne Astronomy
Scientific paper
Photometric observations of the limb and terminator of Mars are analyzed which were performed at wavelengths of 2600 and 2800 A with a two-channel UV photometer aboard the Mars 5 satellite. An ozone layer and two aerosol layers are detected. The ozone layer is estimated to be about 7 km thick and 32 km high, with a maximum O3 concentration of 10 billion per cu cm at 0930 LT and 4 billion per cu cm at 1800 LT. It is found that the upper aerosol layer has a height of about 38 km at 0930 LT and 60 km at 1800 LT, is strongly asymmetric with a scale height of about 2.3 km in the upper part and 15 km in the lower part, has an optical thickness of 0.02 at 0930 LT and 0.002 at 1800 LT, and apparently consists of water ice particles with a mean radius of 0.1 micron and a maximum concentration of 500 per cu cm at 0930 LT. The lower aerosol is shown to be about 20 km high with an optical thickness of approximately 0.1 and a single-scattering albedo of 0.25 at 2800 A and 0.4 at 2600 A.
Krasnopolskii V. A.
Krys'ko A. A.
Rogachev V. N.
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