Re: gravity probe b flare predictions

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Thu Apr 29 2004 - 04:32:53 EDT

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    Kevin wrote:
    
    >They say graviy probe b will point to IM Pegasi, within a 
    >range of 1/100,000th of a degree. So very precise pointing. 
    >So because of that, flare predictions could be made. Ah, 
    >but to spoil the fun, from what I understand, the satellite 
    >wil rotate along the axis which points to the star. So a 
    >spinning satellite, so look out for flashing:)
    
    After Mike said a couple of nights ago that the scientific
    instrument is flying free inside of what Mike called a "van",
    I went to the GP-B web site and Science@NASA:
    
    http://einstein.stanford.edu/
    
    http://science.nasa.gov/headlines/y2004/26apr_gpbtech.htm
    
    to read up on it.  The scientific heart of the mission is 
    floating free inside the van or shell, which is spin-
    stabilized at .1 to 1 rpm, according to this site:
    
    http://samadhi.jpl.nasa.gov/msl/QuickLooks/gravpbQL.html
    
    (I can't read the GP-B site again very well from home due to
    my old, slow dialup-connected PC.  But I would think that 
    site mentions the spin-stabilization also.)
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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