Re: Corona calibration targets

From: William Blair (
Date: Fri Nov 18 2011 - 20:07:39 UTC

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    > I believe those are nothing more than generic survey markers.
    > They are all over the place in that area. I've found about 30 of them.
    Perhaps they are standard markers for aerial surveys that were also used for Corona calibration and that was what was mentioned at the now dead Army Space link labeled "Cold War veteran shares memories of CORONA grid" that is found in the associated "CORONA Calibration Target" photo page?
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