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Re: AO-40 beacon question

on 3/2/03 1:00 PM, k0vty@juno.com at k0vty@juno.com wrote:

> If memory serves me correctly Jon , At 48000 km it take 13 degrees of
> Beam width to cover the hemisphere of the earth which the s/c sees.
> Also the S2 antenna is 10.5 degrees gain which provide depending  on who
> is doing the calculating about 35 degrees of beam width.
> I hope this helps and that my old memory is still ok.    Quite sure
> someone will tell me .

Yes, this was my question.  If the 3 dB beamwidth of the antenna is 35
degrees, then the satellite is probably always illuminating the entire
visible earth at any point in the orbit (I'm ignoring squint here).  This
answers my question.



Jon Ogden
NA9D (ex: KE9NA)

Citizen of the People's Democratic Republik of Illinois

Life Member: ARRL, NRA
Member:  AMSAT, DXCC

http://www.qsl.net/na9d   <- Updated on 1/22/03!!!

"A life lived in fear is a life half lived."

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