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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 58, Iss. 6 — Jun. 1, 1968
  • pp: 747–755

In Situ Measurements of the Photometric Properties of an Area on the Lunar Surface

J. J. RENNILSON, H. E. HOLT, and E. C. MORRIS  »View Author Affiliations

JOSA, Vol. 58, Issue 6, pp. 747-755 (1968)

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A preliminary determination has been made of the photometric properties of the lunar surface from high-resolution pictures received from the Surveyor I spacecraft. Several target areas were chosen at selected locations around the spacecraft, and photometric measurements were taken with the television camera throughout the lunar day. Surveyor I data agree within ±20% with the terrestrially observed photometric properties. Initial examination of the data indicates no anomalies of the photometric properties of homogeneous areas on scales greater than 6 cm in diameter. Luminance factors were estimated from the observed data and ranged from 7.0% to 7.5% for more than 91% of the area; however, values of 5% to 25% were recorded in some locations. The chromaticity coordinates of the disturbed area near one of the footpads were found to be very close to natural sunlight on a gray paint. A preliminary estimate of the spectral radiance factor of this area is given, using an eigenvector-analysis technique. The spacecraft characteristics, viewing geometry, and ground-recording techniques are included, along with a brief description of errors.

© 1968 Optical Society of America

J. J. RENNILSON, H. E. HOLT, and E. C. MORRIS, "In Situ Measurements of the Photometric Properties of an Area on the Lunar Surface," J. Opt. Soc. Am. 58, 747-755 (1968)

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