1991•Antennas and Propagation, 1991. ICAP 91., Seventh International Conference on (IEE)Requires access
Amplitude and frequency variations of HF signals propagated over high latitude paths
E.M. Warrington, T. B. Jones, S.M. Orrell, B.S. Dhanda
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Abstract
The high latitude ionosphere forms a highly dynamic and disturbed medium which can severely affect HF radio signals propagating through these regions. In order to investigate the characteristics of this type of propagation, a frequency agile transmitter has been installed north of the auroral oval, well within the polar cap region. Several receiving and data logging systems were deployed at various sites to provide a variety of trans-auroral oval paths together with one path contained entirely within the polar cap region. Several-one-month experimental campaigns have been conducted at different times of year. Results obtained from measurements undertaken during two of these periods (18 July-11 August 1988 and 16 January-11 February 1989) are presented. >