M. J. Beharrell
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View article: Developments in HF propagation predictions to support communications with aircraft on trans-polar routes
Developments in HF propagation predictions to support communications with aircraft on trans-polar routes Open
Commercial airlines began operations over polar routes in 1999 with a small number of proving flights. By 2014 the number had increased to in excess of 12,000 flights per year, and further increases are expected. For safe operations, the a…
View article: Decoding solar wind-magnetosphere coupling
Decoding solar wind-magnetosphere coupling Open
We employ a new NARMAX (Nonlinear Auto-Regressive Moving Average with eXogenous inputs) code to disentangle the time-varying relationship between the solar wind and SYM-H. The NARMAX method has previously been used to formulate a Dst model…
View article: Substorm‐induced energetic electron precipitation: Impact on atmospheric chemistry
Substorm‐induced energetic electron precipitation: Impact on atmospheric chemistry Open
Magnetospheric substorms drive energetic electron precipitation into the Earth's atmosphere. We use the output from a substorm model to describe electron precipitation forcing of the atmosphere during an active substorm period in April–May…
View article: Substorm‐induced energetic electron precipitation: Morphology and prediction
Substorm‐induced energetic electron precipitation: Morphology and prediction Open
The injection, and subsequent precipitation, of 20 to 300 keV electrons during substorms is modeled using parameters of a typical substorm found in the literature. When combined with onset timing from, for example, the SuperMAG substorm da…