text: from pyLikelihood import JulianDate, SolarSystem
  import os
  
  #This converts from MET to Julian Date
  def _jd_from_MET( met ):
      
      #Old ST
      try:
        ref = JulianDate_missionStart().seconds()
      except NameError:
        ref = JulianDate.missionStart().seconds()
      
      jd=JulianDate( (ref + met) / JulianDate.secondsPerDay )
      return jd
  
  def getSunPosition( met ):
      #environment variable (you need FTOOLS installed and configured)
      os.environ['TIMING_DIR']=os.path.join(os.environ['HEADAS'],"refdata")
      #Get the sun direction
      sun=SolarSystem(SolarSystem.SUN)
      SunSkyDir = sun.direction(_jd_from_MET(met))
      return SunSkyDir
  