Ion cyclotron waves near L = 4.6 - A ground-satellite correlation study

Details Ion cyclotron waves near L = 4.6 - A ground-satellite correlation study Ion cyclotron waves near L = 4.6 - A ground-satellite correlation study

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1451l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1451-1466.

Physics

Geophysics

13

Cross Correlation, Earth Ionosphere, Geomagnetism, Geosynchronous Orbits, Ion Cyclotron Radiation, Ionic Waves, Synchronous Satellites, Ground Stations, Magnetic Flux, Magnetometers, Spacecraft Equipment, Wave Generation

Scientific paper

Results are presented of the first ground-satellite correlation study of ion cyclotron wave events inside geosynchronous orbit. Several intervals are found during which waves at the same frequency were observed simultaneously by the DE 1 Goddard Space Flight Center Fluxgate Magnetometer and by the Air Force Geophysics Laboratory Magnetometer Network. This represents about 33 percent of the intervals during which waves were seen on the ground and DE 1 was in a favorable location (near the geomagnetic equator around L = 4.6) to observe the wave generation region. Three of seven simultaneous events showed a positive correlation when a detailed correlation analysis was performed. Peaks in the the cross-correlation function occurred at delays of 30-100 s and are interpreted as the group delay time of signals from space to the ground station. The small number of events seen in space during conjunction intervals results from the satellite's path missing the source region.

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