Re: CALIPSO

From: Björn Gimle (bjorn.gimle@gmail.com)
Date: Wed May 30 2012 - 15:01:42 UTC

  • Next message: George Roberts: "Re: CALIPSO"

    Gregg is overly modest not mentioning his excellent photographs of
    Calipso passes :
    https://picasaweb.google.com/Gregg.Hendry
    https://picasaweb.google.com/Gregg.Hendry/ChasingCALIPSOLaserBeamsFromSpace#5269505372672399874
    (click the arrow left of the picture, and/or "Gregg's Gallery" to see more)
    
    /Björn
    2012/5/29 Gregg Hendry <gregg.hendry@gmail.com>
    >
    > An instrument aboard CALIPSO projects a visible green laser near its ground
    > track in order to do atmospheric science.  The laser pulses at about 20 Hz
    > and under clear, dark skies makes spots on the ground visible to the naked
    > eye.  The spots are something like 90 meters in diameter and 370 meters
    > apart.
    >
    > For much more information about CALIPSO the following NASA web site is good:
    > http://www-calipso.larc.nasa.gov/
    >
    > Also, coordinate predictions of the beam ground path are usually posted at:
    > http://www-calipso.larc.nasa.gov/tools/overpass/coords/
    >
    > I have personally seen CALIPSO's laser spots moving across the ground,
    > Gregg Hendry
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