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    • Type: Task
    • Status: Open (View Workflow)
    • Priority: Normal
    • Resolution: Unresolved
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      Description

      Return a `pfsConfig` for all SUNSS_IMAGING and SUNSS_DIFFUSE fibers. Use the provided (ra, dec, pa) pointing to generate approximate ra, dec for the fibers. If none provided, set all ra/dec to NaN. In any case, set all pfi positions to NaN.

      ra/dec/pa might be fuzzed to avoid information leakage, but that would be done by the ICC caller.

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            cloomis cloomis added a comment -

            More specifically, we need a (pfs_utils?) library function which returns a pfsConfig given (ra, dec, pa), where (ra, dec) is the telescope pointing and pa is the SuNSS rotator angle w.r.t. the sky.

            We will need a second routine to calculate that pa, since SuNSS has a peculiar physical rotation. But we do have the angle of SuNSS relative to the telescope calibrated, right? yuki.moritani?

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            cloomis cloomis added a comment - More specifically, we need a (pfs_utils?) library function which returns a pfsConfig given (ra, dec, pa), where (ra, dec) is the telescope pointing and pa is the SuNSS rotator angle w.r.t. the sky. We will need a second routine to calculate that pa, since SuNSS has a peculiar physical rotation. But we do have the angle of SuNSS relative to the telescope calibrated, right? yuki.moritani ?
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            yuki.moritani yuki.moritani added a comment -

            Well, I think Jim's document (page 8 of AligningSunssV4.pdf) answers  the question?

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            yuki.moritani yuki.moritani added a comment - Well, I think Jim's document (page 8 of AligningSunssV4.pdf) answers  the question?
            Hide
            cloomis cloomis added a comment -

            Thanks for the pointer. So the x-y shift using the set screws has been applied? In which case the telescope boresight falls on the center fiber, and from there N is 4.1 degrees East of fiber 1 (6.7deg from the truss angle minus the 2.6deg measured calibration for the ferrule seating, etc.). Right? With 7 fibers along the 60deg edge that seems a good match with the figure...

            Show
            cloomis cloomis added a comment - Thanks for the pointer. So the x-y shift using the set screws has been applied? In which case the telescope boresight falls on the center fiber, and from there N is 4.1 degrees East of fiber 1 (6.7deg from the truss angle minus the 2.6deg measured calibration for the ferrule seating, etc.). Right? With 7 fibers along the 60deg edge that seems a good match with the figure...
            Hide
            yuki.moritani yuki.moritani added a comment -

            Yes, one adjustment was applied, and we checked the adjustment.

            https://pfs.ipmu.jp/internal/SlackArchive/Full/commissioning.html

            (See a few conversations from "rhl Sat 2021-04-03 01:58PM")  We were almost there. Further analysis is needed if we apply the second alignment.

            Yes.. 4.1 degree sounds correct.

             

            Show
            yuki.moritani yuki.moritani added a comment - Yes, one adjustment was applied, and we checked the adjustment. https://pfs.ipmu.jp/internal/SlackArchive/Full/commissioning.html (See a few conversations from "rhl Sat 2021-04-03 01:58PM")  We were almost there. Further analysis is needed if we apply the second alignment. Yes.. 4.1 degree sounds correct.  

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                cloomis cloomis
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