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What on earth is this?

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(@drew-r)
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Spotted on a job walk south of Hemet CA, north of Temecula wine country. It's about 5 feet wide and I'm baffled.

 
Posted : August 11, 2021 8:37 pm
(@drew-r)
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1628742720690
 
Posted : August 11, 2021 8:39 pm
(@holy-cow)
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Just a guess.?ÿ Some sort of insect trap as part of a migration study.

We had some weirdly shaped boxes hanging from high tree limbs for a year or two around here as entomologists were tracking a specific bug to determine the potential spread of whatever blight it caused.?ÿ

 
Posted : August 11, 2021 8:57 pm
(@ashton)
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Looks like a radar reflector to me. No idea why it would be there.

 
Posted : August 11, 2021 9:01 pm
(@loyal)
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tlhIngan maH!

 
Posted : August 11, 2021 9:17 pm
(@williwaw)
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@ashton Thatƒ??s exactly what it looks like, just larger than typically used on ships. Maybe related to satellite born radar mapping? Sort of the radar version of a photogrammetry ground target? Just a guess.

 
Posted : August 11, 2021 9:46 pm
(@richard-imrie)
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?ÿ

monolith
 
Posted : August 11, 2021 10:14 pm
(@nate-the-surveyor)
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Pyramid energy collector. From California.

It is kind a a gas station for ufo's.

N

 
Posted : August 12, 2021 2:27 am
(@oldpacer)
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Looks like the control point reflectors used in early laser scanners (interferometry). Maybe farmers using their iphone to lidar their property. Their position could be used to stitch the scans together. Or that's where the aerial drug drop is supposed to be.?ÿ

 
Posted : August 12, 2021 2:58 am
(@bill93)
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Posted by: @loyal

tlhIngan maH!

Klingons?

 
Posted : August 12, 2021 4:31 am
(@peter-lothian)
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It's a conversation piece, and it's working. You're talking about it already.

 
Posted : August 12, 2021 5:06 am
(@john-hamilton)
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I have set those up in the past. They are ground control for airborne radar mapping. Similar to lidar but it will penetrate clouds and not as accurate. Good for areas with near constant cloud cover. The project I worked on was from a fixed wing aircraft, it could probably be for satellite borne sensors as well.?ÿ

 
Posted : August 12, 2021 5:22 am
(@drew-r)
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@john-hamilton thank you, I suspected it was some sort of aerial target. Radar mapping... I was not familiar with this. You have given me something to read up on.

 
Posted : August 12, 2021 6:48 am
(@loyal)
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@bill93 Roger that.

 
Posted : August 12, 2021 9:54 am
(@kevin-hines)
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A 3D photogrametry ground control target?

 
Posted : August 12, 2021 10:06 am
(@dmyhill)
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@john-hamilton?ÿ

I would assume it would also work for SAR?

 
Posted : August 12, 2021 10:22 am
(@john-hamilton)
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@dmyhill Absolutely

 
Posted : August 12, 2021 11:20 am
(@paden-cash)
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ashtray..

 
Posted : August 12, 2021 11:59 am
(@lurker)
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that is a quadrilateral triangle.

 
Posted : August 12, 2021 1:50 pm
(@dave-o)
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@ashton Could be.?ÿ UC San Diego set them up years ago in that area to help initialize, calibrate and monitor seismic activity.

 
Posted : August 12, 2021 3:25 pm
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