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Lunar Atmospheric Composition ExperimentOn the Apollo 17 mission, a miniature mass spectrometer, called the lunar atmospheric composition experiment (LACE), was carried to the moon as part of the Apollo lunar surface experiments package (ALSEP) to study the composition of and variation in the lunar atmosphere. The instrument was successfully deployed in the Taurus-Littrow valley with its entrance aperture oriented upward to intercept and measure the downward flux of gases at the lunar surface. Initial activation of the LACE instrument occurred on December 27, 1972, approximately 50 hr after sunset, and operation continued throughout the first lunar night. Sunrise brought a high background gas level and necessitated discontinuing operation during lunar daytime except for a brief check near noon. Near sunset, operation was resumed and continued throughout the night. This sequence was repeated for the second and third lunations.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Contribution to a larger work
J. H. Hoffman
(The University of Texas at Dallas Richardson, United States)
R. R. Hodges, Jr.
(The University of Texas at Dallas Richardson, United States)
F. S. Johnson
(The University of Texas at Dallas Richardson, United States)
D. E. Evans
(Johnson Space Center Houston, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Publication Information
Publication: Apollo 17 Preliminary Science Report
Publisher: National Aeronautics and Space Administration
Volume: NASA-SP-330
Subject Category
Accession Number
Funding Number(s)
PROJECT: RTOP 914-40-52-01-73
Distribution Limits
Public Use Permitted.
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