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 Check orbfit.rms file to ensure session.info contains only well fitted satellites
  
  USAGE :    sh_check_orbfit  -sess <doy> -tol <rms> -file <name> 
  
          <doy> is the 3 char doy of the session to check
  
          <rms> largest orbfit rms misfit allowed [default 0.1m] 
  
          <name> name of the orbfit.rms file to check against session.info
  
  Examples :   sh_check_orbfit -sess 281 -tol 0.2 -file rms___.tmp
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