Accession Number : AD0640803

Title :   LUNAR INVESTIGATIONS.

Descriptive Note : Final rept., 1 Mar 61-31 Oct 64,

Corporate Author : ARIZONA UNIV TUCSON LUNAR AND PLANETARY LAB

Personal Author(s) : Kuiper,Gerard P. ; Arthur,David W. G. ; Whitaker,Ewen A.

Report Date : APR 1965

Pagination or Media Count : 78

Abstract : The limitations of classical selenodesy, that is, the Bessel-Wichmann method for the moon's constants of rotation, are discussed and methods for overcoming these are described. These methods depend on the use of scaled and oriented lunar photographs. The orientation problem is solved by the acquisition of star-trailed lunar photographs and the observation-reduction technique for these is described. This takes account of the curvature of the trail and the different refractions in the lunar and stellar exposures. The report gives full details of a photogrammetric method (independent of the rotation theory), and a more conventional method, for selenodetic coordinates. Both of these avoid correlation difficulties and the latter is the most direct of all published methods. The techniques for measurement and reduction to obtain relative lunar altitudes have been tested and details are given. The method overcomes the problem of the varying directions of the projected lunar shadows. The calibration theory and methods for the Mann 422-C comparator, used at LPL for selenodetic work, are given. On the publication side the report details the preparation of the Rectified Lunar Atlas, Part II of the Orthographic Atlas of the Moon, and the Consolidated Catalog of Selenographic positions; the latter is still the basis of all precise contemporary lunar cartography. Details of the Yerkes program of selenodetic photography are given. (Author)

Descriptors :   (*MOON, *MAPPING), PHOTOGRAMMETRY, EXTRATERRESTRIAL TOPOGRAPHY, ASTROPHYSICS, ROTATION, MARS(PLANET), JUPITER(PLANET)

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE