NavList:

I would take a pair of low altitude UT time stamped images of the Sun with one near the winter solstice and the other near summer solstice using an off the shelf (10MP or more) digital camera with a 200 mm lens. The Sun's diameter will be good enough for determining the minutes of arc per pixel. The azimuth difference between the two images will provide a good enough cut for a fix. The horizon reference can be from the edge of any body of water or from a boat.

An image could conveniently be faked to give the required exact result. The faked image would include some combination of the Sun, Moon, or Venus visible using the diameter of the Sun or Moon to determine minutes of arc per pixel. This provides two lines of position and a lunar longitude that would match the time stamp for a desired latitude and longitude. Any high resolution digital image with a horizon reference would work.

Greg Rudzinski

[NavList] Position from a photo
From: Geoffrey Kolbe
Date: 27 Dec 2012 13:49
Suppose you wish to covertly record the location of a stash of gold
buried in the Sahara desert (say). Could you take a casual looking
photo which would convey enough information to make a fix within a
few nm of where the photo was taken?

Thanks

Geoffrey

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