[INSTRM-1880] Add refraction correction routine in pfs_utils Created: 04/Mar/23  Updated: 26/Jun/23  Resolved: 26/Jun/23

Status: Done
Project: Instrument control development
Component/s: pfs_utils
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Normal
Reporter: arnaud.lefur Assignee: Unassigned
Resolution: Done Votes: 0
Labels: EngRun
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Blocks
blocks INSTRM-1609 Calculate fibre positions in mm just ... Done
Sprint: Eng12July

 Description   

Just before converging/observing we need to correct the sky coordinates to the current epoch, ( INSTRM-1681) and then correct for the "mean" telescope altitude and atmospheric pressure for the field.

We need two pfs_utils routines to apply these. The final coordinates will be what the fps will converge the cobras to.

see more detail in INSTRM-1609.

 Comments   
Comment by yuki.moritani [ 08/Mar/23 ]

In the current sky-pfi transformation code, the atmospheric refraction is taken into account actually. (If the refraction is not taken into account, the fibers around FoV edge should have ~50–150um shift in EL axis.)

Comment by arnaud.lefur [ 08/Mar/23 ]

Good ! So INSTRM-1882 and INSTRM-1884 and we should be able to close all related tickets.

Comment by yuki.moritani [ 26/Jun/23 ]

This might be closed as won't fix, but I rechecked the code and confirmed refraction correction is included. I close this ticket.

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