Accession Number : AD0257386

Title :   STUDIES IN AURORAL SPECTROSCOPY, AND OF THE RAPID FLUCTUATIONS IN THE GEOMAGNETIC FIELD DURING DISTURBANCES

Corporate Author : OSLO UNIV (NORWAY)

Report Date : 15 JAN 1960

Pagination or Media Count : 1

Abstract : Studies and experimental investigations were directed toward determination of the rapid fluctuations in the strong auroral spectral lines. The mean lifetimes of auroral emission and the deactivation occurring through collisions were studied. The relative displacement of the fluctuations in different spectral lines of aurorae lying at different heights, which would indicate the influence of varying pressure and temperature, was investigated. Where possible, comparisons were made of the auroral phenomena studied and other geophysical or solar features appearing simultaneously. This work included the adoption and operation of a chopping photometer for the special requirements of the foregoing research. Photoelectric studies were conducted on the luminosity distribution within auroral forms, with special attention given to the intensity distribution of the hydrogen lines. An investigation was made of the amplitude and frequency distribution of rapid variations in the geomagnetic field during auroral displays. Observations were attempted on possible very low frequency electromagnetic radiation from aurorae or from extraterrestrial sources close to the earth. (Author)

Descriptors :   *AURORAE, *SPECTROSCOPY, *GEOMAGNETISM, INTENSITY, INTERFEROMETERS, LUMINESCENCE, MAGNETIC STORMS, MEASUREMENT, PHOTOTHEODOLITES, RECORDING SYSTEMS, SPECTROPHOTOMETERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE