I have a set of 3 Wild GDR-11 reflectors. Which can be stacked into a 9 mirror configuration. (Not much call for that these days.)
I was looking for any technical doc on the reflector. I??ve determined the offset, they work great. I am just interested if anyone knows what the Wild published specs are.?ÿ
They are great for those occasions when you have the opportunity to shoot between GPS control points that are really far away.
The triple prism setup provides a better target and amount of reflection to cut thru atmosphere conditions that can cause problems on long EDM shots.
Just curious, I am overloaded with prisms and 3 prism setups, do you have the whole array with tribrach adapter or just the prism reflectors.
https://www.thewildcollection.com.au/acessories
I have 3 identical gdr-11, 242-417, reflectors and yolks, exactly the model in the EBay listing below, except the handle is part of the cast aluminum case not the stainless steel handle. And the reflectors will assemble into a 9 array as well. It??s a nice kit. 3 Stand alone reflectors and stackable.
The thing is the offset. With all confidence I believe they are 70 mm distance offset. That I have no doubt, however, I don??t know what is the published value.?ÿ
And the reflectors were dirt cheap, $65 plus S&H, $100, ea. Actually I had one for decades and just bought two more. Also I just bought a GTS-3. So I thought 3 identical giant triples was a good setup. I do have a circa 1965 AGA, Sweden, triple which has to be 28 mm.?ÿ
Offsets aren??t difficult to determine.?ÿI just found it odd that I can??t find anything about them online.?ÿ
https://www.ebay.com/p/Triple-Prism-Gdr11-Reflector-Surveying-Wild-Heerbrugg/1093877638
Maybe the manual for the Wild DI-10 Distomat has information...
https://amhistory.si.edu/surveying/object.cfm?recordnumber=748493
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