Details
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Type:
Story
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Status: Done
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Resolution: Done
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Fix Version/s: None
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Component/s: DM Subsystem Science, Requirements Documents
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Epic Link:
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Team:DM Science
Description
The DPDD tells us that "Level 1 data products are a result of difference image analysis" (§3.1), as opposed to "Level 2 data products [which] result from direct image analysis" (§4.1).
However, this definition is incorrect. Per LSE-29 (which is the highest-level document in which I can find this defined), "Level 1 Data Products [are] the result of processing of the stream of image data from the Data Collection system during the course of normal observing" (LSR-REQ-0033), while "Level 2 Data Products [are] the result of periodic processing of the entire archive of raw image data from the Data Collection system" (LSR-REQ-0036).
This isn't just mindless pedantry: I think there's an important distinction to be made here. A literal reading of the DPDD would suggest that level some 1 data products are generated during an annual data release, while some of the products of nightly processing (e.g. PVIs) are actually level 2. That's inconsistent with usage elsewhere, and I find it actively confusing. Can we fix it, please?
Attachments
Activity
Field | Original Value | New Value |
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Description |
The DPDD tells us that "Level 1 data products are a result of difference image analysis" (§3.1), as opposed to "Level 2 data products [which] result from direct image analysis" (§4.1).
However, this definition is incorrect. Per LSE-29 (which is the highest-level document in which I can find this defined), "Level 1 Data Products [are] the result of processing of the stream of image data from the Data Collection system during the course of normal observing" (LSR-REQ-0033), while "Level 2 Data Products [are] the result of periodic processing of the entire archive of raw image data from the Data Collection system" (LSR-REQ-0036). This isn't just mindless pedantry: I think there's an important distinction to be made here. A literal reading of the DPDD would suggest that level 1 data products are generated during an annual data release, while some of the products of nightly processing (e.g. PVIs) are actually level 2. That's inconsistent with usage elsewhere, and I find it actively confusing. Can we fix it, please? |
The DPDD tells us that "Level 1 data products are a result of difference image analysis" (§3.1), as opposed to "Level 2 data products [which] result from direct image analysis" (§4.1).
However, this definition is incorrect. Per LSE-29 (which is the highest-level document in which I can find this defined), "Level 1 Data Products [are] the result of processing of the stream of image data from the Data Collection system during the course of normal observing" (LSR-REQ-0033), while "Level 2 Data Products [are] the result of periodic processing of the entire archive of raw image data from the Data Collection system" (LSR-REQ-0036). This isn't just mindless pedantry: I think there's an important distinction to be made here. A literal reading of the DPDD would suggest that level some 1 data products are generated during an annual data release, while some of the products of nightly processing (e.g. PVIs) are actually level 2. That's inconsistent with usage elsewhere, and I find it actively confusing. Can we fix it, please? |
Watchers | John Swinbank, Tim Jenness [ John Swinbank, Tim Jenness ] | Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Tim Jenness [ Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Tim Jenness ] |
Labels | LSE-163 | LSE-163 dm-sst |
Priority | Undefined [ 10000 ] | Minor [ 4 ] |
Team | Project Science [ 11800 ] | DM Science [ 12218 ] |
Watchers | Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Lynne Jones, Mario Juric, Tim Jenness [ Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Lynne Jones, Mario Juric, Tim Jenness ] | Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Lynne Jones, Mario Juric, Tim Jenness, Wil O'Mullane [ Gregory Dubois-Felsmann, John Swinbank, Kian-Tat Lim, Lynne Jones, Mario Juric, Tim Jenness, Wil O'Mullane ] |
Assignee | Mario Juric [ mjuric ] | Leanne Guy [ lguy ] |
Risk Score | 0 |
Risk Score | 0 | 1 |
Due Date | 31/Aug/18 |
Risk Score | 1 | 0 |
Component/s | DM Subsystem Science [ 12208 ] | |
Component/s | Requirements Documents [ 12815 ] | |
Component/s | Design Documents [ 12816 ] |
Due Date | 31/Aug/18 | 14/Sep/18 |
Epic Link |
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Assignee | Leanne Guy [ lguy ] | Colin Slater [ ctslater ] |
Reviewers | John Swinbank [ swinbank ] | |
Status | To Do [ 10001 ] | In Review [ 10004 ] |
Status | In Review [ 10004 ] | Reviewed [ 10101 ] |
Resolution | Done [ 10000 ] | |
Status | Reviewed [ 10101 ] | Done [ 10002 ] |