Re: ICESAT

From: Daniel Crawford (djcunix@sound.scc.net)
Date: Thu Dec 19 2002 - 10:00:57 EST

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    70 m across?
    
    If this is the case, I would expect that this would be really difficult to end
    up seeing.  How long does it take for a satellite to cover 70m in ground
    track?  With respect to a stationary observer, wouldn't the laser be only
    visible for a fraction of a second?
    
    
    This launch was delayed again.
    
    On Wed, 11 Dec 2002, Kevin Fetter wrote:
    
    >
    >
    > From: "Björn Gimle" <b_gimle@algonet.se>
    > To: <SeeSat-L@satobs.org>
    > Subject: Re: ICESAT
    > Date: Wed, 11 Dec 2002 15:55:54 +0100
    >
    >  >
    >  > The neat thing about this satellite is it has a 532 nm ( green light )
    > laser
    >  > on board. The laser pulses at 40 times a second. So while we observe
    >  > sunlight reflecting off the satellite, we should keep an eye out for
    > that
    >  > pulsing laser light.
    >  >
    > or while in penumbra + umbra ??
    >
    > I don't see why not.
    >
    > The only problem is the way the laser is directed, towards the ground track.
    > The spot of light from the laser on the ground at the ground track, is
    > approx 70 m across.
    >
    > So it wil be hard to see laser light coming directly from the laser it
    > appears, unless you go to the ground track.
    >
    > What do you think?
    >
    > Kevin
    >
    >
    >
    >
    >
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