Details
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Type:
Story
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Status: Reviewed
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Resolution: Unresolved
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Fix Version/s: None
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Component/s: None
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Labels:
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Story Points:4
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Epic Link:
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Team:Data Release Production
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Urgent?:No
Description
update Jan 2022
Original ticket title: Investigate amp background level offsets in DECam postISRCCDs
This ticket updates the DECam ISR overscan correction config parameter fitType='MEDIAN_PER_ROW'. A large body of evidence (see comments below) point towards this being a superior approach at handling overscan corrections with DECam. This also brings Science Pipelines data processing in-line with the DECam Community Pipeline, which also fits per row.
Original ticket efforts by Kenneth Herner, original description below:
If you scroll through here, the problem is immediately apparent
https://lsst.ncsa.illinois.edu/~lskelvin/hits2014/
Hat-tip to Lee Kelvin for noticing this problem and plotting the images. This feels very familiar to when ISR order of operations was inconsistent regarding when assembleCcd happens, but I don't remember the resolution.
Possibly relevant and/or wrong: https://community.lsst.org/t/a-change-to-the-order-of-operations-for-isr/3060
Attachments
Issue Links
- relates to
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DM-33096 Enable empirical read noise calculation for DECam ISR
- To Do
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- Done
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- Done
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- Done
- split to
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- To Do
Activity
| Labels | SciencePipelines | SciencePipelines ap-analysis |
| Assignee | Meredith Rawls [ mrawls ] |
| Assignee | Meredith Rawls [ mrawls ] |
| Attachment | merian_bias_01.png [ 50087 ] | |
| Attachment | merian_bias_35.png [ 50088 ] | |
| Attachment | merian_bias_45.png [ 50089 ] |
| Attachment | merian_flat_01.png [ 50158 ] |
| Attachment | merian_flat_05.png [ 50159 ] |
| Attachment | merian_flat_25.png [ 50160 ] |
| Attachment | merian_flat_35.png [ 50161 ] |
| Attachment | merian_flat_45.png [ 50162 ] |
| Attachment | merian_flat_55.png [ 50163 ] |
| Attachment | merian_flat_01.png [ 50158 ] |
| Attachment | merian_flat_05.png [ 50159 ] |
| Attachment | merian_flat_25.png [ 50160 ] |
| Attachment | merian_flat_35.png [ 50161 ] |
| Attachment | merian_flat_45.png [ 50162 ] |
| Attachment | merian_flat_55.png [ 50163 ] |
| Attachment | merian_flat_01.png [ 50164 ] | |
| Attachment | merian_flat_05.png [ 50165 ] | |
| Attachment | merian_flat_25.png [ 50166 ] | |
| Attachment | merian_flat_35.png [ 50167 ] | |
| Attachment | merian_flat_45.png [ 50168 ] | |
| Attachment | merian_flat_55.png [ 50169 ] |
| Assignee | Meredith Rawls [ mrawls ] |
| Assignee | Meredith Rawls [ mrawls ] | Kenneth Herner [ kherner ] |
| Epic Link |
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| Sprint | AP F21-2 (July) [ 1102 ] | |
| Team | Alert Production [ 10300 ] |
| Sprint | AP F21-2 (July) [ 1102 ] | AP F21-3 (August) [ 1109 ] |
| Rank | Ranked higher |
| Sprint | AP F21-3 (August) [ 1109 ] | AP F21-4 (September) [ 1113 ] |
| Rank | Ranked higher |
| Sprint | AP F21-4 (September) [ 1113 ] | AP F21-5 (October) [ 1119 ] |
| Rank | Ranked higher |
| Sprint | AP F21-5 (October) [ 1119 ] | AP F21-6 (November) [ 1124 ] |
| Rank | Ranked lower |
| Sprint | AP F21-6 (November) [ 1124 ] | AP S22-1 (December) [ 1126 ] |
| Rank | Ranked lower |
| Sprint | AP S22-1 (December) [ 1126 ] | AP S22-2 (January) [ 1130 ] |
| Rank | Ranked lower |
| Epic Link | DM-30502 [ 510160 ] | DM-30543 [ 511201 ] |
| Sprint | AP S22-2 (January) [ 1130 ] | |
| Story Points | 2 | 4 |
| Team | Alert Production [ 10300 ] | Data Release Production [ 10301 ] |
| Assignee | Kenneth Herner [ kherner ] | Lee Kelvin [ lskelvin ] |
| Description |
If you scroll through here, the problem is immediately apparent
[https://lsst.ncsa.illinois.edu/~lskelvin/hits2014/] Hat-tip to [~lskelvin] for noticing this problem and plotting the images. This feels very familiar to when ISR order of operations was inconsistent regarding when assembleCcd happens, but I don't remember the resolution. Possibly relevant and/or wrong: [https://community.lsst.org/t/a-change-to-the-order-of-operations-for-isr/3060] |
{panel:title=update}
Original ticket title: Investigate amp background level offsets in DECam postISRCCDs This ticket updates the DECam ISR overscan correction config parameter {{fitType='MEDIAN_PER_ROW'}}. A large body of evidence (see comments below) point towards this being a superior approach at handling overscan corrections with DECam. This also brings Science Pipelines data processing in-line with the DECam Community Pipeline, which also fits per row. Original ticket efforts by [~kherner], original description below: {panel} If you scroll through here, the problem is immediately apparent [https://lsst.ncsa.illinois.edu/~lskelvin/hits2014/] Hat-tip to [~lskelvin] for noticing this problem and plotting the images. This feels very familiar to when ISR order of operations was inconsistent regarding when assembleCcd happens, but I don't remember the resolution. Possibly relevant and/or wrong: [https://community.lsst.org/t/a-change-to-the-order-of-operations-for-isr/3060] |
| Issue Type | Bug [ 1 ] | Story [ 10001 ] |
| Summary | Investigate amp background level offsets in DECam postISRCCDs | Switch DECam overscan correction to median per row |
| Reviewers | Kenneth Herner [ kherner ] |
| Status | To Do [ 10001 ] | In Progress [ 3 ] |
| Description |
{panel:title=update}
Original ticket title: Investigate amp background level offsets in DECam postISRCCDs This ticket updates the DECam ISR overscan correction config parameter {{fitType='MEDIAN_PER_ROW'}}. A large body of evidence (see comments below) point towards this being a superior approach at handling overscan corrections with DECam. This also brings Science Pipelines data processing in-line with the DECam Community Pipeline, which also fits per row. Original ticket efforts by [~kherner], original description below: {panel} If you scroll through here, the problem is immediately apparent [https://lsst.ncsa.illinois.edu/~lskelvin/hits2014/] Hat-tip to [~lskelvin] for noticing this problem and plotting the images. This feels very familiar to when ISR order of operations was inconsistent regarding when assembleCcd happens, but I don't remember the resolution. Possibly relevant and/or wrong: [https://community.lsst.org/t/a-change-to-the-order-of-operations-for-isr/3060] |
{panel:title=update Jan 2022}
Original ticket title: Investigate amp background level offsets in DECam postISRCCDs This ticket updates the DECam ISR overscan correction config parameter {{fitType='MEDIAN_PER_ROW'}}. A large body of evidence (see comments below) point towards this being a superior approach at handling overscan corrections with DECam. This also brings Science Pipelines data processing in-line with the DECam Community Pipeline, which also fits per row. Original ticket efforts by [~kherner], original description below: {panel} If you scroll through here, the problem is immediately apparent [https://lsst.ncsa.illinois.edu/~lskelvin/hits2014/] Hat-tip to [~lskelvin] for noticing this problem and plotting the images. This feels very familiar to when ISR order of operations was inconsistent regarding when assembleCcd happens, but I don't remember the resolution. Possibly relevant and/or wrong: [https://community.lsst.org/t/a-change-to-the-order-of-operations-for-isr/3060] |
| Status | In Progress [ 3 ] | In Review [ 10004 ] |
Kenneth Herner
made changes -
| Status | In Review [ 10004 ] | Reviewed [ 10101 ] |
Kenneth Herner
made changes -