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Recommendations

  1. The Thermal Characteristics of the Panels

    The DAY-NIGHT panel movement should be clarified. It is likely to be a straightforward task with modern laser metrology. It is important to know if the effect is real; and if so, whether the effect could be mitigated by careful choice of the time/temperature when the panels are locked to the backup structure.

  2. The Thermal Characteristics of the Reflector

    The apparent large diurnal deformations is also an important question, but probably a` harder task to resolve. It is probable that this falls into the collection of known daytime problems, along with pointing shifts and changes in focal length.

  3. Ring 14

    This ring, (and most importantly the top left hand quadrant) should be raised, at least to form a smooth continuum with rings 13 and 15.

  4. Rings 15, 16 and 17

    These also need attention, but it might be best to attend to just the top left hand quadrant in the first instance, and wait for fresh holography surveys once the major defects have been remedied.

  5. Better Signal to Noise for the Outer Rings

    It would be useful if more energy could be collected from the outer rings - Since the satellite provides plenty of signal, a low efficiency feed with wider beam angle could be tolerated.

  6. Minor Housekeeping in rings 1-13

    Close examination of the images of the central area (rings 1-13) show that a number of panels could benefit from minor adjustment.

  7. Feed Offsets

    These should be checked after the worst of the ring 14 steps have been remedied.


next up previous
Next: References Up: The Effelsberg Holography Campaign Previous: Feed Position
Jürgen Neidhöfer 2001-10-24