[amsat-bb] Re: Wind Turbine Interference?

John aa1ye at amsat.org
Sun Nov 4 22:26:40 PST 2007

At 16:28 11/4/07 -0800, you wrote:
>>Wind Turbines are a threat to Homeland Defense. They can produce large Blind
>>Spots on Radars - above, infront and behind them - so yes they can cause
>>problems to RF signals.
>>Effects of Windfarms on Radar
>That is some pretty good stuff for higher powered xmitters...But I 
>doubt there is any instrument sensitive enuff to measure the 
>reflection potential from any satellite we will ever launch, and the 
>"shadow" that it would cause on a LEO is in less than a 
>second...HEO's may take a little longer....
>This is conjecture based on my HS physics...I would appreciate 
>comments from any of the many engineering experts we have on here...
>            73, Dave wb6llo at amsat.org

  1.	I have to admit I do not understand your term "reflection potential
from any satellite".
	I would greatly appreciate an explanation of this effect and how to
calculate its magnitude on a received satellite signal.

  2.	How do you calculate the "shadow time" (of this QRM?) to be less than
a second?

	73s  de  AA1YE

PS:	Checking your QRZ entry and your bio reminds me that I learnt to fly
"Stringbags" in WW2. But the war ended before we were deployed to a
carrier. I should have been older or declared a false age to join.


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