At the end of the day I met with Conor Sayres (UW) to discuss the problem of measuring the position of focal-plane fiber-carrying robots given images from in-telescope cameras (focal viewing cameras) inside the telescopes that are operating the SDSS-V Project. We have not installed the fiber robots yet, but Sayres has a software mock-up of what the focal viewing camera will see and all its optics. We also discussed some of the issues we will encounter in commissioning and operation of this viewing system.
Later, in the night, I worked on data-driven transformations between focal-plane position (in mm) in the telescope focal plane and position in the focal viewing camera detector plane (in pixels). I followed the precepts and terminology described in this paper on interpolation-like problems. My conclusion (which agrees with Sayres's) is that if these simulations are realistic, the fitting will work well, and we will indeed know pretty precisely what all the fiber robots are doing.
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