Vanjast's sextant is calibrated for the NYGM cameras.dat. Perhaps this is the culprit! What I have seen in my own testing is a non-linear vertical distortion. As I have described above, I couldn't get the angle right so that it works on all latitudes. But then I didn't test the new cameras.dat, yet. However, by using the binocs to measure the elevation, I think we might be able to get better readings and in the range of 0.1° or so. At the moment it is still a little bit on the coarse side.
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