Abstract

On board the EXOS‐D (Akebono) satellite is a five channel PFX subsystem of VLF instruments, working to determine the wave normal or k vector and Poynting vector directions by measuring two components of E and three components of B fields using wire and loop antennas.In order to confirm the characteristics or capability of determining the k vector and the Poynting vector of a coherent VLF Omega signal transmitted from Australia have been analyzed. The observed Omega signal has been found to be right‐handed polarized with Poynting vector is making a small angle with the geomagnetic field and lies nearly on the plane constructed by the geomagnetic field and k vector. The refractive index deduced from the E and B fields well agrees with that calculated by Appleton Hartree formula.

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