lonosonde signatures of Pc1 pulsations

• Published in: Journal of Atmospheric and Terrestrial Physics
• Main Authors: Aslin, P.M., Jarvis, Martin J., Morrison, K.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier 1991
• Subjects: Antarctic; Antarc*
• Online Access: http://nora.nerc.ac.uk/id/eprint/519640/; https://doi.org/10.1016/0021-9169(91)90118-Q

The first observations of the signatures of Pc1 pulsations in ionosonde echo data are reported. Oscillations are frequently observed in Doppler velocity, echo amplitude, group range and skymap echo-location position, and are clearly associated with simultaneous Pc1 geomagnetic micropulsations with a similar frequency. These oscillations, recorded at the sub-auroral Antarctic station of Halley (76° S, 27°W, L ~ 4.2), occur in either or both E- and F-region echo time series during a wide range of ionospheric conditions. Focusing of the ionospheric echoes due to the compressional action of the hydromagnetic wave is suggested as a possible mechanism.