NEC-LIST:MF Propagation

Hi,
        Does anyone know where I can find information on the effect of
transmit power on the interference zone between sky wave and ground wave? It
has been suggested to me that the zone can be shifted by altering the
transmitted power, this seems unlikely but is the ionisation of the
reflecting layers affected by the intensity of the incident wave, especially
at high power levels? I am particularly interested in the effect at dusk /
dawn and dawn / dusk transition.
        If anyone can point me in the right direction I would be grateful.

John Webber CEng, MIEE
Principal Engineer, Antennas
Merlin Communications International Limited
Innovation Centre
Gallows Hill
Warwick CV34 6UW
Tel: 01926 623042
Fax: 01926 623040
Mobile: 07970 132418
email: john.webber_at_merlincommunications.com

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