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  1. Instrument control development
  2. INSTRM-2685

Correct coordinate transformation reflecting the result of raster scan in run 24

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    • Sprint:
      preRun24Sep2025

      Description

      Several raster scan was carried out in the run 24 in September 2025.

      The data shows that offset on the telescope plane needs to me updated.

       

      In addition, the several set of MCS images with cobra at home position revealed that PFI position transformed from MCS position is highly deviated from expected position. 

      (In the above figure, displacement of FFs and every 100 fibers are plotted.)

      The shift is on a given pattern, which quite resembles to that seen HSC and MCS test with pin-hole mask. Also, the displacement is scaled by zenith angle. This pattern was actually implemented in the past, but its elevation dependency was not considered (measured). This displacement affects distortion measurement by FFs in later stage.

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        1. test mcs on pfi_InR00.png
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          yuki.moritani
        2. test mcs on pfi_InR90.png
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          yuki.moritani
        3. test mcs on pfi_mod_InR00.png
          58 kB
          yuki.moritani
        4. test mcs on pfi_mod_InR90.png
          57 kB
          yuki.moritani

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            • Assignee:
              yuki.moritani yuki.moritani
              Reporter:
              yuki.moritani yuki.moritani
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                Updated:
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