[PIPE2D-45] Explain structures in assembled CCD images Created: 22/Jul/16 Updated: 24/Sep/16 Resolved: 24/Sep/16 |
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| Status: | Done |
| Project: | DRP 2-D Pipeline |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Story | Priority: | Major |
| Reporter: | aritter | Assignee: | aritter |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Sprint: | 2014-16 |
| Description |
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The outer ~40 rows/columns are darker than the rest of the image, plus it seems like the last columns of the left CCD and the first columns of the right CCD are bad. Need to investigate |
| Comments |
| Comment by rhl [ 30/Jul/16 ] |
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The darker edges are almost certainly due to standard electrostatic issues at the edges of thick CCDs (what DECam calls "glowing edges"). The first and last columns sound different. Please split this into another ticket and provide more details (e.g. pictures!) |
| Comment by rhl [ 24/Sep/16 ] |
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Some of this is There is also some funny stuff (a pixel or three) at the very start of the read in each amp, and a weird off-by-one problem thought to be in the FPGA ( |