bullet

      Dish Surface Optimization System - April 2003 Results


      The first row of pictures is of Ganymede, one of Jupiter's moons, from April 2, 2003 scans by SHARCII.  This was taken at small zenith angles, where the primary has the most distortions.
      With 52 activated assemblies, the object's shape changed from a clover leaf pattern to more of a circular shape of the moon.  The peak signal power of Ganymede improved an average of 45%

      The second row of pictures is of Callisto, another moon of Jupiter, from April 24, 2003 scans by SHARCII.  This was taken at large zenith angles, close to the horizon.  With 70 activated assemblies, the object's peak signal power increased by 50%.

      Without correction the telescope at 350 microns has an aperture efficiency of 33%.  
      Surface correction with the DSOS has improved the aperture efficiency of the telescope to an estimated value of 45% at 350 micron.


      (.pdf formats of memos below pictures)

      DSOSoff5d
      DSOS OFF.  Ganymede.  ZA = 5°
      DSOSon15d
      DSOS ON.  Ganymede.  ZA = 15°  (52 channels)

      DSOSoff75d

      DSOS OFF.  Callisto.  ZA = 75°

      DSOSon73d

      DSOS ON.  Callisto.  ZA = 73°  (70 channels)


      For memos on these images: DSOS52.pdf   DSOS70.pdf


      bar

       home