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The intercrater plains of Mercury and the Moon: Their nature, origin and role in terrestrial planet evolution. Areal measurement of Mercury's first quadrantVarious linear and areal measurements of Mercury's first quadrant which were used in geological map preparation, map analysis, and statistical surveys of crater densities are discussed. Accuracy of each method rests on the determination of the scale of the photograph, i.e., the conversion factor between distances on the planet (in km) and distances on the photograph (in cm). Measurement errors arise due to uncertainty in Mercury's radius, poor resolution, poor coverage, high Sun angle illumination in the limb regions, planetary curvature, limited precision in measuring instruments, and inaccuracies in the printed map scales. Estimates are given for these errors.
Document ID
19830003745
Document Type
Thesis/Dissertation
Authors
Leake, M. A.
(Arizona Univ. Tucson, AZ, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1982
Publication Information
Publication: NASA, Washington Advan. in Planetary Geol.
Subject Category
Lunar And Planetary Exploration
Funding Number(s)
CONTRACT_GRANT: NSG-7146
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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