posted on Dec, 29 2017 @ 08:06 PM
It is a test/observation facility of some type. It does resemble a FLR-9 HFDF antenna, which is ~1,450' in diameter.
This Dugway structure is not an antenna. The giveaway is the presence of four large (50' or so) light towers just outside the ~320' diameter circle
of approx 80 vertical masts. Look closely at the four masts and their shadows, and you'll see they are light towers similar to what you see at high
school football fields, but with steel skeleton masts.
Inside the circle of the 80 vertical masts on the east side is an elevated platform (see the legs in the shadow imagery?), probably the place where
various optical, IR, and electronic sensors are mounted to observe and record the activities underway. There also appears to be a grid of concrete
monuments/markers in the ground in 8' increments. This dimension becomes larger farther from the center. These markers are probably indexed with
unique identifiers to allow accurate placement of test materiel and allow accurate location of post-test materiel.
All of this is easily seen in GE imagery. Cheers and happy new year to all!