[amsat-bb] Re: Close encounters of the Asteroidal Kind

Greg Dolkas ko6th.greg at gmail.com
Fri Feb 8 07:26:10 PST 2013

Is the 435KW an EIRP number, or power into their feed.  I was thinking the
later.  No?

Greg. KO6TH
On Feb 8, 2013 6:53 AM, "Robert Bruninga" <bruninga at usna.edu> wrote:
> > I wonder what 435kw at 28,000 km will do to the surface temperature on
> that rock?
> Let's see, power goes down as 1/R squared.  So lets compare it to a
> candle.  A candle is about 50 Watts or about (435000/50W) or about 10,000
> times less power.  Take the square root of that to get about 100/th the
> range.
> So that radar at 28,000 km will heat the surface about as much as a candle
> would at 280km.  (unless I screwed up before my morning coffee)...
> Bob,WB4APR
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