Physics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49..573b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, no. 6, June 1987, p. 573-598.
Physics
9
Data Processing, Midlatitude Atmosphere, Polar Regions, Polarization (Waves), Power Spectra
Scientific paper
Properties of simultaneously observed Pi1Bs are derived from data from one midlatitude and five high-latitude stations. It is shown that the high- and midlatitude observations exhibit a high degree of correlation in the onset, duration, and temporal fine structure, but not in the amplitude behavior. In the Pi1B power spectrum, an enhancement at 0.08-0.25 Hz is frequently observed at all stations in both horizontal components. In the approximately geographic north-south direction, the attenuation of the Pi1B amplitude at mid and high latitudes at the southern flank of the amplitude maximum is of the order of 10 and 40 dB/1000 km, respectively. In the frequency range where the power enhancement is observed, a right-handed sense of polarization dominates at high latitudes and a left-handed one at midlatitudes. The implications of these observations for the generation and propagation mechanisms of the Pi1B signal are discussed.
Bosinger Tilmann
Wedeken U.
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