Accession Number : AD0286099

Title :   EXPERIMENTS WITH MONOCHROMATIC ALL-SKY CAMERAS

Corporate Author : SASKATCHEWAN UNIV SASKATOON

Personal Author(s) : RAMSDEN,D.

Report Date : NOV 1960

Pagination or Media Count : 1

Abstract : Several optical systems for observing monochromatic emissions with an all-sky camera are described and discussed. They were tested at wavelengths 5577, and 3914 A and should also be useful at 5893 A. They appear capable f gathering useful data but with ordinary fast films require exposures of half an hour or more. New films with tenfold greater speed may reduce this limitation. A preliminary investigation of twilight fluorescence in the 3914 A band of N2(+) suggests that it is only present during auroral activity. (Author)

Descriptors :   *ASTRONOMICAL CAMERAS, *MOTION PICTURE CAMERAS, *OPTICAL EQUIPMENT, AURORAE, INTERFEROMETERS, MONOCHROMATIC LIGHT, NIGHT SKY, SKY BRIGHTNESS, SPECTROGRAPHIC CAMERAS, TWILIGHT

Distribution Statement : APPROVED FOR PUBLIC RELEASE