Demonstrating the use of a class of min-max smoothers for D-region event detection in narrowband VLF phase

Lotz, S.I.; Clilverd, Mark ORCID: https://orcid.org/0000-0002-7388-1529. 2019 Demonstrating the use of a class of min-max smoothers for D-region event detection in narrowband VLF phase. Radio Science, 54 (3). 233-244. 10.1029/2018RS006701

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Abstract/Summary

This paper describes the use of a class of non‐linear smoothers for the identification of interesting phenomena in narrowband very low frequency (VLF) transmission phase caused by perturbation events in the D‐region of the ionosphere. The LULU smoothers, named for their smoothing of upward (L) and downward (U) peaks in a signal, usually used for image processing tasks, are described and examples are shown where these operators are used to automatically isolate and identify features in the phase of narrow band transmissions received at high and high‐middle latitudes (Antarctica and Marion Island, respectively). Identification of solar flare events, electromagnetic ion cyclotron wave precipitation and substorm injection events are demonstrated, showing the potential for this technique to be used for space weather monitoring.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2018RS006701
ISSN:	0048-6604
Date made live:	01 May 2019 13:28 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/522394

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