Pi1B propagation in the high-latitude ionosphere

Details Pi1B propagation in the high-latitude ionosphere Pi1B propagation in the high-latitude ionosphere

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jgra..11703322y&link_type=abstract

Journal of Geophysical Research, Volume 117, Issue A3, CiteID A03322

Physics

Ionosphere: Auroral Ionosphere (2704), Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Ionosphere: Wave Propagation (0689, 3285, 4275, 4455, 6934), Magnetospheric Physics: Mhd Waves And Instabilities (2149, 6050, 7836), Magnetospheric Physics: Substorms

Scientific paper

We present a statistical study of approximately 40 Pi1B events, using data gathered from an induction coil magnetometer array located in Svalbard, Norway, showing good alignment along the magnetic meridian: Hornsund (corrected geomagnetic (CG) latitude = 74.23° magnetic latitude (MLAT), magnetic local time (MLT) midnight = 21:01), Longyearbyen (CG latitude = 75.29° MLAT, MLT midnight = 20:50), and Ny Ålesund (CG latitude = 76.30° MLAT, MLT midnight = 20:56). We find that average attenuation across the 0.001-1.0 Hz bandwidth is in the range of 30-37 dB/1000 km but that attenuation is not independent of frequency. The nonlinear dependence of attenuation on frequency is most pronounced for sunlit events, and the complexity is expected to result from a mixing of ducted and direct Pi1B signals.

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