The monitoring depot provides a base for operations at Nuclear Disposal Area 2. Typical crew would include 2-4 astronauts, plus 2 medical/security staff. The distinctive circular building has an attached launch pad.
Notice the unusual curved corridor, the illuminated panels (far plainer than those on Moonbase Alpha), and the unusual door with window.
The windows of the studio set closely match the circular model, but the corners on the far side of the studio windows extend out.
The Monitoring Depot is on a raised mound to one corner of Area 2. Two other depots are just visible on the opposite sides of Area 2. Presumably there are four, one at each corner of the disposal area. Some may be unmanned monitoring and flight control information (Eagle flights would require DME/VOR stations/ ILS localizers). The crews may move to the depot closest to the active side of Area 2.
There were two smaller buildings (in scale with the 22 inch Eagle) and one large building (in scale with the 44 inch Eagle).
Eagles land on a "T"-shaped pad. The view through the window of the Eagle landing shows the boarding tube on the opposite side. The later view when Area 2 starts to explode shows the boarding tube on the side closer to the depot. The view from the windows would look down on the pad.
The backdrop painting shows the laser fence (we seem to be approximately at ground height, not raised like the model building, and relatively close). A large rock face is visible right and on the left windows.
Unusually the door has a window.
Copyright Martin Willey