Image Details
Caption: Figure 7.
Astrometric residuals per GFA as a function of the position angle with respect to the zenith (measured CCW around the DESI focal plane) in the CCD X (red) and Y (blue) directions for a set of fields in the SW at zenith distance 45°. Solid lines are a model fit.
© 2023. The Author(s). Published by the American Astronomical Society.