Ionospheric path error
Alternative terms: Ionospheric error, Skywave error
The total systematic and random error resulting from the reception of a navigational signal after ionospheric refraction. It may be due to (1) Variations in the transmission path (2) Non-uniform height of the ionosphere (3) Non-uniform propagation within the ionosphere (4) Horizontal components of refraction (5) Back scatter (6) Forward scatter.
Reference: I.R.E. (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM