somehiker
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GPS location of the billboard. 33.582050°, -111.553169° Goggle Earth shows it standing in 2018.
View attachment 1847412
View attachment 1847414
That's the one on Stewart Mountain, a few miles away from the one Eldo believes is a "canopy". Easier to get to, lots of folks been up to that one.
There are several others to the N, S, and West of Phoenix as well, which were used until January of this year as targets for checking the alignment of Air Traffic Control Radar. Close to, and connected, each target also has a microwave repeater (PAROT), which returns an identifier code to the radar operator. This system has now been superseded by ADS-B, and will be dismantled as time and funding allows.
Looks like they've already started on Eldo's.
Here's a shot of both the target board and PARROT unit on Stewart Mtn .......
along with the relevant part of a checklist formerly used by ATC personnel (Air Traffic Controllers).....
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