dsc35712.jpg

Plaque mounted on the SES (it can be seen in several of the overall pictures, such as dsc35702.jpg mounted on the top-most silver band on the darker colored bottom portion of the SES). It reads

NASA
Goddard Space Flight Center
Greenbelt, Maryland
Space Environment Simulator

The "worm" NASA logo dates the plaque to the 1975-1992 timeframe.