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Spectral reflectance and emittance of Apollo 11 and 12 lunar material.The thermal radiation properties of Apollo 11 and 12 fines (soils) are reviewed and presented as a function of wavelength, angle of illumination, and bulk density. The spectral directional reflectance is presented for wavelengths from 0.6 to 2 microns and for angles of illumination of 10, 20, 30, 45, and 60 deg. The normal emittance is presented for wavelengths from 2.5 to 14.5 microns. The solar albedo and total normal emittance as a function of temperature were calculated from the spectral values. The solar albedo for Apollo 11 fines is 0.099 whereas for Apollo 12 fines is approximately 0.119 for angles of illumination of 10 deg and a density of 1600 kg cu m.
Document ID
19720055943
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Birkebak, R. C.
(Kentucky, University Lexington, Ky., United States)
Date Acquired
August 6, 2013
Publication Date
August 1, 1972
Publication Information
Publication: AIAA Journal
Volume: 10
Subject Category
Space Sciences
Accession Number
72A39609
Funding Number(s)
CONTRACT_GRANT: NAS9-0898
Distribution Limits
Public
Copyright
Other

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