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PFISR nightside observations of naturally enhanced ion acoustic lines, and their relation to boundary auroral features by Michell, R. G.; Lynch, K. A.; Heinselman, C. J.; Stenbaek-Nielsen, H. C. is a Physics and Astronomy article available to read on EtoBox.

What is PFISR nightside observations of naturally enhanced ion acoustic lines, and their relation to boundary auroral features about?

Abstract. We present results from a coordinated camera and radar study of the auroral ionosphere conducted during March of 2006 from Poker Flat, Alaska. The campaign was conducted to coincide with engineering tests of the first quarter installation of the Poker Flat Incoherent Scatter Radar (PFISR). On 31 March 2006, a moderately intense auroral arc, (~10 kR at 557.7 nm), was located in the local magnetic zenith at Poker Flat. During this event the radar observed 7 distinct periods of abnormally large backscattered power from the F-region. These were only observed in the field-aligned radar beam, and radar spectra from these seven times show naturally enhanced ion-acoustic lines (NEIALs), the first observed with PFISR. These times corresponded to (a) when the polar cap boundary of the auroral oval passed through the magnetic zenith, and (b) when small-scale filamentary dark structures were visible in the magnetic zenith. The presence of both (a) and (b) was necessary for their occurrence. Soft electron precipitation occurs near the magnetic zenith during these same times. The electron density in the vicinity where NEIALs have been observed by previous studies is roughly between 5 a

Who reads PFISR nightside observations of naturally enhanced ion acoustic lines, and their relation to boundary auroral features?

Author

Michell, R. G.; Lynch, K. A.; Heinselman, C. J.; Stenbaek-Nielsen, H. C.

Publisher

Copernicus Group; Copernicus GmbH; Copernicus Gesellschaften; Göttingen: Copernicus Publ. (ISSN 0992-7689)

Published

2008

Language

EN

Field

Physics and Astronomy (Physical Sciences)