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J. P. Ferrise phase of the VLF waves changes the signal will alter its frequency. In a navigation system based on VLF transmissions these changes in the propagation time must be taken into account..In this paper the influence of high latitude disturbances on VLF propagation, based on measurements carried out at

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查看完整版本: Titlebook: Terricolous Lichens in India; Volume 2: Morphotaxo Himanshu Rai,Dalip K. Upreti Book 2014 Springer Science+Business Media New York 2014 eco