Accession Number : AD0739168

Title :   Spatial Correlation of Auroral Radio Absorption.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Toman,Kurt ; Cormier,Raymond J. ; Corbett,John J.

Report Date : 17 SEP 1971

Pagination or Media Count : 20

Abstract : The temporal behavior of auroral radio absorption measured with riometers at medium and high latitudes displays complex patterns that differ spatially. These differences may be limited to a time-displacement of otherwise similar absorption patterns, indicating a movement which could be interpreted in terms of a structured, locally enhanced, precipitating, energetic particle stream that moves over a geographic area while preserving its structure. In order to assess numerically the spatial coherence of auroral radio absorption, a correlation study of such absorption patterns has been undertaken. Data were recorded by more than eight riometer stations during five days of varying activity containing the magnetic storm of 18 April 1965. With a day as the sample size, the results of this study provide a view of the spatial coherence of auroral absorption which could be exploited further for the prediction of ionospheric propagation in the arctic. (Author)

Descriptors :   (*AURORAE, RADIOFREQUENCY INTERFERENCE), (*IONOSPHERIC PROPAGATION, POLAR REGIONS), MAGNETIC STORMS, IONOSPHERIC DISTURBANCES, ABSORPTION SPECTRA, CORRELATION TECHNIQUES

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE