On Sat, 20 Mar 2010, Alexander S. Yurkov wrote:
> 
> By the way one can imagine some 'reverse whistler' if TX radiate
> apropriate FM signal which is 'de-chirped' by dispersion in ionosphere.
> Can you roughly estimate radiated power needed to observe such 'naturaly
> compressed' signal? I expect it is not 'amateur' power. But it is
> interesting is this power reachable for professional station or not.

Anyway this power is much lower the power needed to observe 'normal
whistler' man-generated. Reason is simple: requred energy 'expanded' in
time. Seems factor should be ~10^4 or more?

Regards,
Alexander