The east astrometric hut and parts of the variable baseline are at the right, while an unudes cement astromentric pier is in the foreground. The North astrometric hut open and closed. This setup also eliminated the polarization problems encountered earlier with the 50-foot Stellar Interferometer. The huts are lined with rigid foam insulation faced with aluminum foil. Daytime hut temperatures are kept near nighttime levels by air conditioning the hut.
Arrows show the starlight pathways as the go through the system.
The lab building has two major areas - the optical table and the delay lines. Figure 8 shows the optical table. At the lower left, is the window end of the vacuum line bringing light from either the east siderostat or the north arm of the variable baseline. At the lower left of Figure 8 can be seen the window end of the vacuum line bringing starbeams from either the east astrometric siderostat or the north arm of the variable baseline. Above is part of the table cover which is lowered down onto the table during operation.