The "Astronaut" is none other than Robert Smyth, Grumman Test pilot, examining the Metalastic wheels of the simulator. This photo shows the mock-up of the lunar surface, built by Grumman to test the Mobile Base Simulator, ( Rover) a 31- ft. prototype vehicle for manned lunar exploration. The moonscape was constructed of light-reflecting cinder and blast furnace slag and was based on pictures sent back to earth by Ranger 9.

Thanks to Tim Lent for the information on the photo.

Grumman Version of the "Lunar Rover"
Photo taken at Calverton, NY
December 6, 1966