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desihub / desimeter

DESI coordinates and transformations
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Lookup table for residuals scale factor between focal plane and sky coordinate #191

Open julienguy opened 2 years ago

julienguy commented 2 years ago

There is a residual scale factor between focal plane and sky coordinates that vary from exposure to exposure. It is likely part of this variation could be predicted as a function of the telescope pointing (HA,Dec).