Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..381c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 12, June 1985, p. 381-384.
Physics
25
Auroras, Dipole Antennas, Dynamics Explorer 1 Satellite, Geomagnetism, Kilometric Waves, Phase Shift, Polarization (Waves), Radio Antennas, Triangulation, Wave Propagation
Scientific paper
In addition to its wave rotation sense, the direction of auroral kilometric radiation (AKR) can also be measured with the plasma wave instrument on Dynamics Explorer 1, from the relative phase of the signals received by its orthogonal electric dipole antennas. By this method, which differs in principle from the previous spin-null method for measuring wave directions, it has been found possible to pinpoint the AKR source by triangulation, using measurements from different points along the DE-1 orbit. The resulting apparent source, in one instance, seemed to occupy a well-defined auroral-zone invariant magnetic latitude and showed the expected increase of altitude with decreasing frequency. An analysis of the method also confirmed the validity of the previous rotation sense measurements.
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