DESTINATION MOON: A History of the Lunar Orbiter Program
 
 
CHAPTER IX: MISSIONS I, II, III: APOLLO SITE SEARCH AND VERIFICATION
 
Results of the First Mission
 
 
 
[244] Lunar Orbiter I photography was subjected to numerous analyses, photometric enhancement processes, and evaluations by technicians and scientists at the Langley Research Center. Following this a more extensive screening process of Mission I photography was made by specialists from Jet Propulsion Laboratory, the Manned Spacecraft Center, NASA Headquarters, Boeing, the United States Geological Survey, and Langley. They studied very carefully all Orbiter I photographs and generated preliminary terrain and geologic maps and screened photographic data for acceptable Apollo sites. [245] This effort started the major process of Apollo site selection and data analysis.33
 
Some of the most significant problems which the first mission photography revealed were the following: 1) photographic imperfections due to mechanical operation in the photo subsystem (for example, partial dryout of the Bimat because of pressure variation of a roller in the processor mechanism produced a narrow strip of incorrectly processed film); 2) density variations caused by the Ground Reconstruction Equipment kinescope tubes; 3) smear of high-resolution photographs caused by inadvertent triggering of the focal-plane shutter of the 610 mm lens. This problem has been previously discussed.34
 

 
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