The hardware and software testing of the primary mirror support system continues with the dummy mirror. To date, no off-zenith testing has been done. May. Roller screw cams will also be modified to prevent lockup. Hard points will be partially disassembled and re-lubricated the proper vacuum grease. All modifications of the hardpoints and testing will be completed within the next two weeks.
All parts are ready for installation.
Installation will not take place until the mirror is in the cell. The operational back covers have been painted and latches are being fabricated. Until the visual interferometer null lens is measured, the conic constant of the primary will not be known to the specified precision. If the secondaries are polished to the specifications, this uncertainty will be transferred to the focal plane location. We discussed the effect of this uncertainty on the different f-number systems.