Accession Number : AD0673991

Title :   PROPAGATION OF PC1 GEOMAGNETIC MICROPULSATIONS IN THE MAGNETOSPHERE AND THE IONOSPHERE.

Descriptive Note : Final rept.,

Corporate Author : NEWCASTLE UNIV (AUSTRALIA) DEPT OF PHYSICS

Personal Author(s) : Ellyett,C. D. ; Fraser,B. J. ; Bagnall,F. T. ; Manchester,R. N. ; McNabb,P. W.

Report Date : APR 1968

Pagination or Media Count : 157

Abstract : The report details original equipment for continuously recording Pc1 geomagnetic micropulsations on magnetic tape with timing accuracy of less than 0.1 second. Analysis of the records is carried out by using both frequency-time and amplitude-time techniques. An extensive study of temporal variations in Pc1 in relation to propagation in the magnetosphere is detailed. Signals are generated in the lambda = 4.5 - 9.5 region of the magnetosphere and show diurnal and geomagnetic disturbance variations. The theoretical problem of north-south propagation of Pc1 signals in an ionospheric duct is treated. Comparison with experimental results show that wave group velocities in the duct vary from 400 to 800 km/sec, depending on the electron concentration in the duct and hence local time. (Author)

Descriptors :   (*IONOSPHERIC DISTURBANCES, CHARGED PARTICLES), (*ELECTROMAGNETIC PULSES, PROPAGATION), MAGNETOSPHERE, IONOSPHERE, DIURNAL VARIATIONS, ELECTRON DENSITY, VELOCITY, RECORDING SYSTEMS, MAGNETIC RECORDING SYSTEMS, ACCURACY, DETECTORS, MAGNETIC STORMS, PROTONS

Subject Categories : Atmospheric Physics
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE