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Ionospheric plasma fluctuations induced by the NWC very low frequency signal transmitter
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  • Magnus Fagernes Ivarsen,
  • Park Jaeheung,
  • Yaqi Jin,
  • Lasse Boy Novock Clausen
Magnus Fagernes Ivarsen
University of Oslo

Corresponding Author:[email protected]

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Park Jaeheung
Korea Astronomy and Space Science Institude
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Yaqi Jin
University of Oslo
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Lasse Boy Novock Clausen
University of Oslo
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Abstract

The Australian NWC (North West Cape) signal transmitter is known to strongly interfere with the topside ionosphere. We analyze 456 conjunctions between Swarm A, B and NWC, in addition to 58 conjunctions between NorSat-1 and NWC. The in-situ measurements provided by these satellites include the 16 Hz Swarm Advanced Plasma density dataset, and the novel 1000 Hz plasma density measurements from the m-NLP system aboard NorSat-1. We subject the data to a detailed PSD analysis and subsequent superposed epoch analysis. This allows us to present comprehensive statistics of the NWC-induced plasma fluctuations, both their scale-dependency, and their climatology. The result should be seen in the context of VLF signal transmitter-induced plasma density fluctuations, where we find counter-evidence for the existence of turbulent structuring induced by the NWC transmitter.
May 2021Published in Journal of Geophysical Research: Space Physics volume 126 issue 5. 10.1029/2021JA029213