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Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora

Permanent lenke
https://hdl.handle.net/10037/25446
DOI
https://doi.org/10.1002/2015JA021819
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article.pdf (5.133Mb)
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Dato
2015-12-01
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
van der Meeren, Christer; Oksavik, Kjellmar; Lorentzen, Dag Arne; Rietveld, Michael T; Clausen, Lasse Boy Novock
Sammendrag
In this paper we study how GPS, GLONASS, and Galileo navigation signals are compromised by strong irregularities causing severe phase scintillation (σϕ>1) in the nightside high-latitude ionosphere during a substorm on 3 November 2013. Substorm onset and a later intensification coincided with polar cap patches entering the auroral oval to become auroral blobs. Using Global Navigation Satellite Systems (GNSS) receivers and optical data, we show severe scintillation driven by intense auroral emissions in the line of sight between the receiver and the satellites. During substorm expansion, the area of scintillation followed the intense poleward edge of the auroral oval. The intense auroral emissions were colocated with polar cap patches (blobs). The patches did not contain strong irregularities, neither before entering the auroral oval nor after the aurora had faded. Signals from all three GNSS constellations were similarly affected by the irregularities. Furthermore, two receivers spaced around 120km apart reported highly different scintillation impacts, with strong scintillation on half of the satellites in one receiver and no scintillation in the other. This shows that areas of severe irregularities in the nightside ionosphere can be highly localized. Amplitude scintillations were low throughout the entire interval.
Forlag
Wiley
Sitering
van der Meeren C, Oksavik K, Lorentzen DA, Rietveld MT, Clausen LBN. Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora. Journal of Geophysical Research (JGR): Space Physics. 2015;120(12):10607-10621
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  • Artikler, rapporter og annet (UB) [3249]
Copyright 2015 The Author(s)

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