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    SA eliminator
    From: Mal Misuraca
    Date: 1997 Dec 13, 8:32 AM

      The program to eliminate the random SA error in GPS fixes is loaded
    into a laptop, to which then the GPS is connected by a serial cable.  The
    program calculates the mean fix from its continuous sampling of the GPS
    fixes and graphically displays the individual fixes and the mean and
    reads out the mean in La, Lo.
    
      Given the accuracy that the author claims, the SA Watch program would
    be significantly more accurate that differential GPS, accurate to a few
    centimeters.  I have not used the program in a location that would test
    it to its theoretical limits, but I have heard from a friend that
    surveyors use something like this to achieve accuracy in that order.
    
      I suppose the trick would be finding a point of known La, Lo that met
    the demands of accuracy sufficient to test the GPS.
    
      I hope that anyone with more and better information will feel free to
    correct me for any errors here.
    
      Mal Misuraca
      Passage East
      Sausalito
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