Fig. 2From: Statistical study on propagation characteristics of Omega signals (VLF) in magnetosphere detected by the Akebono satellite a Duration of data processed in the magnetic and electric field below altitude 640 km. b Omega signal propagation for the Norway station in the magnetic field, and c the electric field. The rectangle indicates the location of the Norway station at latitude 55.96° N and longitude 100.72° EBack to article page