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• W2551583886 abstract "Certain studies were made of the lunar surface based on measurements at visible and far infrared wavelengths obtained from a scan over the full Moon. The large number of data points available made it possible to refine the albedo statistics over the disk previously described by Sytinskaya (1953). The simultaneous measurements at the two wavelengths provided a factor for converting full Moon photometric brightness to bolometric albedo. The disk-averaged value of this parameter is consistent with previous photometric measurements. The brightness temperature statistics over the disk led to a replacement of the traditional cos1/~ 0 law of temperature variation over the full Moon by an expression which is linear in cos 0. Certain characteristics of the lunar surface are described in this paper (Part 1) and in a companion work (Part II) by Saari, Shorthill, and Winter. T he studies are based on 23 scans of the sunlit portion of the surface through a lunation. Simultaneous measure- ments were made at 0.45 and 10-12/~ to a resolution of about 1% of the lunar radius. Isophotic and isothermal contours were subsequently drawn from the data and have been published, together with a description of the instrumentation, calibration, and the measurements (Shorthill and Saari, 1965; Saari and Shorthill, 1967). The reader is referred to the referenced report for a description of various observational aspects of the study. Likewise, a discussion of photometry is available in a report which describes photometric phase curves corresponding to 300 lunar features (Shorthill et al., 1969). The emphasis in Part I is on certain results from the scan closest to full Moon. The data from this scan made possible a study of the distribution of albedo over the disk based on a great many more points than were available in a previous study by Sytinskaya (1953). Moreover, since simultaneous infrared data were also available, it was possible to determine the changes of observed temperature with full-Moon brightness and thus to derive a conversion factor from the latter to bolometric albedo. The non-Lambertian emission of the lunar surface at full Moon was measured by t The untimely passing of John M. Saari (.cf. The Moon 2, 405-407, 1971) has deprived the community of lunar scientists of one of its most vigorous and imaginative workers. Not unexpectedly, a number of projects were left unfinished at the time of his death, including a jointly-authored report of previously unpublished work pertaining to the photometric and infrared properties of the illuminated lunar surface. Despite the fact that the work is incomplete in certain respects, the manuscript contained a number of previously unreported items of general interest to workers in the field. For this reason, and in deference to Jack's memory, his colleagues have assembled the work into the two-part paper, entitled 'The Sunlit Lunar Surface', which appears in the pages which follow. The Editor expresses his gratitude to Drs. R. R. Green, J. F. Linsky, and D. F. Winter for reading and commenting upon these manuscripts." @default.
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• W2551583886 date "1972-01-01" @default.
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• W2551583886 title "I. Albedo Studies and Full Moon Temperature Distribution" @default.
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