[DManA]

Tells you nothing about their current technology since these things are decades old (from the erosion you see on them).

[citizenK]

Looks like the work was completed in 2005, between April 13 and May 29. Google Earth has historical imagaery at the coordinates (40.45, 93.74) referenced by Las Vegas Dave.
The April 13 image shows site with trucks and work-in-progress with respect to the resulting pattern. The May 29 image shows site abandonment.

[GingisK]

Our satellite calibration targets are kept in the tool box of a hummer and laid out on a handkerchief when the job is performed..