Details
-
Type:
Improvement
-
Status: To Do
-
Resolution: Unresolved
-
Fix Version/s: None
-
Component/s: obs_lsst
-
Labels:None
-
Team:External
Description
The official document describing the focal plane layout is https://docushare.lsst.org/docushare/dsweb/Get/Version-65557/LCA-13381-B-APPROVED-(DetectorPlaneLayout).pdf
The amp names in this document are Segment00 -> Segment17. However, within the DM stack, amp.getName() returns C00 -> C17. This has caused confusion. Can I assume that C12 is the same as Segment12? The EXTNAME values in the fits headers are also SegmentXX. We either need to edit the approved focal plane layout and change the EXTNAME in the headers, or we need to change the amp names in DM to be SegmentXX so that they agree with the focal plane document and the headers. I propose the latter, but we can discuss.
Attachments
Activity
And note that the amplifiers have 3 numbering systems in LCA-13381. "Output" was used only by the CCD vendors - we should not use it at all. "Segment", ie. 00 to 07 and 10 to 17, is the most official name and numbering scheme. And we added "Amp" # 1 to 16 which was used as the FITS extension number and in Camera EOTest code and outputs.
Aaron Roodman
added a comment - And note that the amplifiers have 3 numbering systems in LCA-13381. "Output" was used only by the CCD vendors - we should not use it at all. "Segment", ie. 00 to 07 and 10 to 17, is the most official name and numbering scheme. And we added "Amp" # 1 to 16 which was used as the FITS extension number and in Camera EOTest code and outputs.
To add further confusion, documents such as LCA-10140 define the FITS "CHANNEL" keyword as a number from 1 to 16.