The whistlers and chorus received at College, Alaska during the period
from December 1955 through March 1958 are studied particularly with respect
to temporal variations.
The diurnal curves for whistler activity show maxima after midnight
local time while the seasonal variation peaks during the winter. It appears
that these variations in whistler activity are in part explainable in
terms of very low frequency propagation conditions.
The diurnal variation of chorus shows a maximum at about 1400 hours
local time. By the use of data from lower latitude stations a dependence
of this time of diurnal maximum on the geomagnetic latitude of the station
is shown.
The coefficients of correlation for chorus activity versus magnetic
activity were determined on a monthly basis. A seasonal variation in these
correlations is indicated which appears to be unique for the geomagnetic
latitude of College.
A preliminary statistical study of one of the more easily measured
characteristics of chorus is discussed. The characteristic chosen is the
mid-frequency in an element of chorus. A diurnal variation in this parameter
is indicated.The research reported in this document has been sponsored by
the Electronic Research Directorate of the Air Force Cambridge
Research Center, Air Research and Development Command, Air Force Research Contract No. AF 19(604)-1859Figures -- Abstract -- Introduction -- Instrumentation -- Observations -- Analysis - Whistlers -- Analysis - Chorus -- Discussion -- Acknowledgement -- ReferencesYe
