Accession Number : AD0671303

Title :   SOME RELATIONSHIPS BETWEEN AURORA AND NATURAL VLF AND LF NOISE AT PLATEAU STATION, ANTARCTICA,

Corporate Author : STANFORD UNIV CALIF STANFORD ELECTRONICS LABS

Personal Author(s) : Flint,Robert B. , Jr

Report Date : FEB 1968

Pagination or Media Count : 52

Abstract : Various relationships between aurora as observed in all-sky photographs and natural noise at frequencies of 1.5, 8, 50, and 110 kHz are found from data taken at Plateau Station, Antarctica, during the austral winter of 1966. The investigation is carried out in two parts: diurnal variations in occurrence are found for aurora and noise, and a minute-by-minute examination of relationships is made for a one-week period. Diurnal occurrence of noise at 110 kHz peaks before magnetic midnight at about the same time as a peak occurs in the more familiar diurnal curves of occurrence of noise at 8 kHz and of aurora. Examples are shown of several events in which associations between variations in noise and variations in auroral elevation, intensity, form, and rate of change can be found from detailed comparison of the data. The majority of all noise changes during the week is found to coincide with changes in the aurora. (Author)

Descriptors :   (*AURORAE, RADIO WAVES), VERY LOW FREQUENCY, DIURNAL VARIATIONS, NOISE, INTENSITY, ABSORPTION, LOW FREQUENCY, EMISSIVITY, RESOLUTION, AERIAL PHOTOGRAPHS, ELECTROMAGNETIC RADIATION, ANTARCTIC REGIONS

Subject Categories : Atmospheric Physics
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE