Subj : Satellite Antenna
To   : Zetanet
From : Spaceman Spiff
Date : Mon Aug 30 2004 08:20 pm

  Re: Satellite Antenna
  By: Zetanet to Angus Mcleod on Mon Aug 30 2004 02:42 am

 >   Re: Satellite Antenna
 >   By: Angus Mcleod to Spaceman Spiff on Mon Aug 30 2004 01:41 am
 > 
 >  >   Re: Satellite Antenna
 >  >   By: Spaceman Spiff to Kusho on Sun Aug 29 2004 18:35:00
 >  >
 >  >  > think are satellites. I watched one go a third of the way across the s
 >  >  > seemed to vanish. Either it went into the Earths shadow or the panals 
 >  >  > angle? (most probable and rational explanations)
 >  >
 >  > Satellites don't "wave their arms about".  Repositioning a satellite usin
 >  > "magnetorquing" can take many hours as the satellite attitude is graduall
 >  > changed.  Even satellites with positive attitude correction, fire up thei
 >  > motors *very* rarely.  It cost a flippin' fortune, and there is no refuel
 >  > so firing a kick-motor is not something that is undertaken lightly.
 >  >
 >  > What you most likely noticed was the satellite passing through the termin
 >  > between full daylight and the earth's penumbra or umbra.
 >  >
 >  > When watching satellites, the best time is shortly after full nightfall, 
 >  > are in the dark, but the satellites are still fully illuminated.  In the 
 >  > of the night, there is no sunlight overhead, so the satellites can't be s
 >  >
 >  > After a clear day flying at out club, we often sit around and talk after 
 >  > sun goes down.  We frequently see a number of satellites passing overhead
 >  > Sometimes 8-10 in one evening -- accasionally 2-3 at a time.  Nobody's ev
 >  > worked out which birds they were, but it shouldn't be too hard...
 >  >
 > 
 > You a pilot or you fly something else? Also the satellites you normally see 
 > amatuer build probably because most of the others are communications sats an
 > stationary. Correct me if I am wrong.
 > 
 > Webdaddy
 > 
 > 
 > 
There are a lot of satellites that are not in GEOSYNC, but low Earth orbit,
like Weather Sats, Military sats, Global positioning, Spy sats, Geographic
mapping sats, NASA planetary study sats....Sats from every country that can
afford a to put up sats and yes   HAM sats.  Check out the link several posts
ago and you can view the sats be catagory. It is amazing that they don't run
into eachother.

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