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Some ionospheric factors affecting the coverage of an HF/VHF direct broadcasting satellite service

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4 Author(s)
Rush, C.M. ; US Department of Commerce, Boulder, CO, USA ; Stewart, F. ; PoKempner, M. ; Reasoner, R.

A study has been undertaken to assess the effects of the ionosphere on the performance of a direct broadcasting satellite service operating in the high frequency (HF) band. Results relating to two issues of performance are presented: 1) determining under what conditions a frequency allocated to the broadcasting service can be expected to reach the surface of the earth from a satellite and 2) the loss of signal strength due to passage through the ionosphere, it was found that if high frequency broadcast services are to be provided on a worldwide basis using satellite platforms, the satellites need to be optimally configured for the intended service area. Also, a 3 dB loss of signal strength is expected due to ionospheric absorption.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:34 ,  Issue: 4 )