Item #003204 USAF lunar wall mosaic, LEM-1B. Lunar earthside hemisphere in orthographic projection. ACIC.
USAF lunar wall mosaic, LEM-1B. Lunar earthside hemisphere in orthographic projection.
USAF lunar wall mosaic, LEM-1B. Lunar earthside hemisphere in orthographic projection.
USAF lunar wall mosaic, LEM-1B. Lunar earthside hemisphere in orthographic projection.

USAF lunar wall mosaic, LEM-1B. Lunar earthside hemisphere in orthographic projection.

St. Louis: Aeronautical Chart and Information Center, 1963.

1st Edition. No Binding. Very Good. Item #003204

1st edition, January 1963. Scale 1:2,500,000. Single map on two lithographed sheets, sheet size 1470 x 890 mm, lunar diameter 1390 mm. The sheets with a few short kinks, but generally very well preserved. ----

"The USAF Lunar Reference Mosaic (LEM) is a composite photo mosaic of the moon produced from selected photographs taken at Mt. Wilson, McDonald and Pic du Midi Observatories. Sections of twenty-four photographs were chosen which would provide a constant sun angle in order to maintain a uniform portrayal of lunar craters and prominences. This mosaic was compiled to an orthographic projection which shows the moon as a sphere as viewed from an infinite distance. Position was determined through the use of selenographic control established primarily from the measures of Franz and Saunder as compiled in the Orthographic Atlas Of the Moon, edited by G. P. Kuiper in 1960. Each photograph was copied to a common scale and rectified to mean libration in order for it to match or fit adjacent sections." (NASA LPI online resource).
"In 1962, LEM-I was recompiled from improved photo imagery and issued at scales of 1: 10,000,000; 1:5,000,000 and 1:2,500,000, the latter in two sheets and titled USAF Lunar Wall Mosaic (LEM-IB). This series of lunar mosaics has been one of the most popular items in the ACIC lunar map inventory. The mosaics have been very much in demand as a wall display and as a base for various indices. All three sizes of LEM are lithographed in duotone blue and gray against a solid black background." (Z. Kopal & R.W. Carder, Mapping of the Moon: Past and Present, p.115).

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