Continue assembly of the cabin. Continue Pad 9 preparation. Fringes at 650 GHz delayed until Fall 2000. There seems to be a serious misalignment in the optical train in Antenna 4. Attention has focused on Mirror 4.
Various measurements are underway, including mapping the response of a small absorber in the beam.
Because of this problem no meaningful holography has been done on Antenna 4. The optical pointing system is now working and measurements of star positions are underway. The first row of the BUS for Antenna 5 is half complete. Progress halted until more tubes arrive from Taiwan. The new heatbeat, DDSs and second downconverter are now functional, and connected to the rest of the system.