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Mariner 9 ultraviolet spectrometer experiment - 1971 Mars' dust storm.The brightness of a region on the south polar cap centered at approximately -87 deg S, 10 deg W was observed. Measurements taken at various incidence and emission angles show that the brightness increased with decreasing air mass. The observed intensity consists primarily of a component reflected from the cap and twice attenuated by the atmosphere and a component diffusely reflected from the atmosphere. The dust cloud over the polar cap was moderately thick between Nov. 26 and Dec. 2, 1971. At this time the optical thickness was near unity, and it decreased approximately linearly with time, reaching a value close to that of a Rayleigh atmosphere by mid-February. The optical thickness showed little dependence on the wavelength during the early orbital observations.
Document ID
19730059594
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pang, K.
Hord, C. W.
(Colorado, University Boulder, Colo., United States)
Date Acquired
August 7, 2013
Publication Date
March 1, 1973
Publication Information
Publication: Icarus
Volume: 18
Subject Category
Space Sciences
Accession Number
73A44396
Distribution Limits
Public
Copyright
Other

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