RE: GOES question

From: Dale Ireland (direland@drdale.com)
Date: Thu Feb 12 2009 - 18:59:49 UTC

  • Next message: Bob Christy: "Re: GOES question"

     That assumes the satellite is directly between the Sun and Earth. However,
    it is a trick question because solar x-rays do not penetrate to the Earth's
    surface.
    Dale
    
    > -----Original Message-----
    > From: Chris Jones [mailto:clj@panix.com] 
    > Sent: Thursday, February 12, 2009 10:48 AM
    > To: Thomas Ashcraft
    > Cc: SeeSat-L@satobs.org
    > Subject: Re: GOES question
    > 
    > Thomas Ashcraft wrote:
    > > I have a math question for anyone here:
    > > 
    > > The GOES satellites monitor X-rays from the Sun.  What would be the 
    > > difference in time ( a matter of seconds?) between when 
    > solar x-rays 
    > > hit the GOES sats and then hit the surface of the Earth?
    > > 
    > > I hope the question is clear and if not I will re-ask.
    > 
    > I would say less than a matter of seconds.  GOES satellites 
    > are in a geostationary orbit (that's what the G in their name 
    > means), which is about 1/4 light-second from the earth's 
    > surface.  Solar X-rays, unlike some other particles ejected 
    > from the sun, travel at the speed of light.
    > 
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