ABSTRACT
Radiation from power lines at high harmonics (PLHR) of the fundamental has long been recognized as an electromagnetic compatibility problem for telephonic communication, particularly in industrial areas. The field line grounded on the 500-km Winnipeg power line appears to be the most active for wave-particle interaction in the magnetosphere. Ground measurements of the intensity and character of very low frequency radiation from power lines are essential to the interpretation of both satellite observations of PLHR emissions the ionosphere and the associated line radiation events recorded at Siple and Hailey Bay in Antarctica. The Winnipeg power line is a dedicated 7000-kVA line which extends some 500 km to the northeast over Ontario and the Canadian Shield. A special campaign was mounted by the Sheffield Space Physics Group in Newfoundland in the summer of 1982 to aid in the interpretation of Ariel 4 data and line radiation events recorded at the conjugate Antarctic station, Hailey.
