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Observations of HF propagation on a path aligned along the mid-latitude trough

This paper categorises the different ways in which the midlatitude trough (a frequent feature over the UK) affects HF communications. Propagation categories are related to the trough’s morphology, and their frequency of occurrence with an aim towards better prediction of long distance HF communications and navigation. This is important to our long-term goal of

providing space-weather-based forecasting for the aviation industry, which relies on HF communications, particularly on polar routes. Continuation of this work has been funded by the EPSRC (grant number EP/K008781/1 value; £347,135)

Reference: Dr David Boteler, Head of Geomagnetic Laboratory, Natural Resources Canada, David.Boteler@NRCan-RNCan.gc.ca)