Accession Number : AD0000014


Title :   Fluctuations of Starlight and Skylight


Descriptive Note : Progress rept. 1 Oct-31 Dec 51


Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS


Personal Author(s) : Hynek, J Allen


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/000014.pdf


Report Date : 15 Mar 1952


Pagination or Media Count : 18


Abstract : Studies are to be made on the fluctuations in small areas of daytime sky, the quality of scattered blue daylight sky, and the extension of daytime and nighttime astronomical seeing to the near infrared. A photoelectric photometer was designed to make a permanent record of the behavior of areas observed by the 12.5-in. refracting telescope. The photometer uses a 1P21 photomultiplier tube, and has interchangeable filters and diaphragms and a solid CO2-cooled tube chamber. Illumination patterns of the 69-in. mirror of the 104- ft. focal-length Perkins Observatory reflecting telescope are being studied to obtain information about the manner in which daytime starlight illuminates the mirror. A literature survey of previous work on astronomical seeing is being conducted.


Descriptors :   *STARLIGHT , MEASUREMENT , ILLUMINATION , VISIBILITY , ASTRONOMY , NEAR INFRARED RADIATION , TELESCOPES


Subject Categories : Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE