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) |
DSOS OFF. Ganymede. ZA = 5° |
DSOS ON. Ganymede. ZA = 15° (52 channels) |
DSOS OFF. Callisto. ZA = 75° |
DSOS ON. Callisto. ZA = 73° (70 channels) |
For memos on these images: DSOS52.pdf DSOS70.pdf |