Initial results from a tracking receiver direction finder for whistler mode signals

Details Initial results from a tracking receiver direction finder for whistler mode signals Initial results from a tracking receiver direction finder for whistler mode signals

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.1601l&link_type=abstract

Journal of Geophysical Research, vol. 83, Apr. 1, 1978, p. 1601-1610.

Physics

2

Propagation Modes, Radio Direction Finders, Signal Analysis, Tracking Stations, Whistlers, Ducts, Receivers, Very Low Frequencies, Waveguides

Scientific paper

An apparatus combining a tracking receiver and a direction-finding signal processor for observation of VLF whistler mode signals is described. In July-August 1975 the tracker/direction finder was successfully field tested at Roberval, Canada. Observations were made on natural whistlers and emissions and on signals from the Siple, Antarctica, VLF transmitter. As a test of accuracy on arrival bearing of whistler mode signals, the output was compared with results from a goniometer operating from the same set of crossed loop and vertical antennas. The two systems agreed within about 10 degrees on several-minute averages of bearings of both Siple transmitter pulses and natural signals. Effects of multipath propagation and polarization error have been identified. It is found that whistler mode signal paths in the outer plasmasphere have ionospheric exit points that can frequently be resolved to within a region 30-40 km on a side. The apparent whistler mode signal path endpoints are relatively close to the ionospheric projections of the field lines along which the wave energy propagated.

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