The welding of the cabin floor extension is almost complete. The performance of the elevation servo is very good. The rms position error while tracking at one quarter of sidereal rate is about 0.3 arcseconds. There will be more fine tuning of parameters. There are occasional low-level oscillations at the structure's lowest resonance frequency of 7.5 Hz, but they are insignificant.
Work is almost complete on hooking up the azimuth servo.
The azimuth servo has the additional complication of two motors and backlash. The status is as follows. Dexter is specifying the circuit and Ken Wilson is handling the layout and fabrication. MIT expects to be completely finished with their part of the correlator by JAN 31, 2000. The bare correlator boards are expected to be delivered to MIT in early November.