Accession Number : AD0762820

Title :   Balloon-Borne Spectroscopic Observation of the Infrared Hydroxyl Airglow,

Corporate Author : UNIVERSITY OF WESTERN ONTARIO LONDON DEPT OF PHYSICS

Personal Author(s) : Lowe,R. P. ; Lytle,E. A.

Report Date : 01 SEP 1972

Pagination or Media Count : 6

Abstract : A balloon-borne grating spectrometer has been used to study the spectrum of the airglow between 1.8 micrometer and 3.6 micrometers and its diurnal variation. The principal features identified are the bands of the delta v = 2 and delta v = 1 sequences of the vibration-rotation spectrum of OH. The brightness of the 1-0 band at night was measured to be in the range 270-400 kR on two flights. A sudden decrease in the intensity of the hydroxyl bands occurred in morning twilight at a solar depression of 4 degrees and is ascribed to the photodissociation of ozone. The temperature, as indicated by the Q/R branch ratio, rose from 170K at night to 255K at noon indicating a reduction in the height of the emitting layer during the day. (Author)

Descriptors :   (*AIRGLOW, INFRARED SPECTROSCOPY), SKY BRIGHTNESS, NIGHT SKY, DIURNAL VARIATIONS, FREE RADICALS, TWILIGHT, METEOROLOGICAL BALLOONS, CANADA

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE