Re: NEC-LIST: Near field - Flat Earth

Hi,

I have found from the study of comparisons of Norton's attenuation
factor over a plane earth with actual measured data, that the "flat
earth" assumption works to a reasonable distance, certainly at low
frequencies.

E.g. 55km at 1161 kHz and maybe a bit more possibly 75km.

There is a good reference on Norton's work and propagation in general
at

  http://www.its.bldrdoc.gov/pub/ntia-rpt/99-368/

Regards,

Ralph Holland, VK1BRH
http://www2.dynamite.com.au/vk1brh
Received on Thu Jun 22 2000 - 07:18:41 EDT