(back to the list of all DM-SST meeting minutes)


11:00 PT



Room System

Phone Dial-in

Short : ls.st/dmsst 

Zoom: https://noirlab-edu.zoom.us/j/97839121776?pwd=K1JPeUpSMXFvSXJSa2xORGkyVk5zdz09

Zoom Meeting ID: 978 3912 1776 
Zoom Password: 512314

Dial closest IP: (east coast) and (west coast) then use the Zoom meeting ID 978 3912 1776  as the dialing extension.

For example: 978 3912 1776 @ or: 3912 1776  Password: 512314

Dial-in numbers:

+1 346 248 7799 (US Toll)

+1 669 900 6833 (US Toll) Meeting ID: 936 2540 1560 International numbers available: https://gemini.zoom.us/u/adcUNrbXzS



Discussion items


ItemWhoPre-Meeting NotesNotes and  Action Items
Project/Science Updates

PCW debrief  - feedback and thoughts. 

Topics of concern/interest to DM Science

  • Snaps - when will a decision be made and what are the criteria to decide  1x30 or 2x15. Can we document this in advance? Leanne
  • Photo-z  and the use of RAIL. Integrate into the science pipelines or accept as an in-kind contribution? Jim, Melissa
  • Multi-scale postage stamps - Eric – Alerce document
  • Incremental Template Generation - Eric/Leanne  
  • Crowded Fields - Colin (after next session)
  • RSP features & functionality prioritization - Gregory
  • What are we doing with AuxTel data
  • Embargoing of templates - what is the accessibility of templates especially in commissioning with the 30day period
  • Frequency of updating templates - we currently plan to update templates every year with every DRP. There has been some feedback from the parts of the  Community that we should never  update templates.  
  • Snaps
    • ER: what are the criteria to decide on snaps, when will we decide, can we do it now? Do we have the code ready to run snaps (no)
    • LPG: we will test this in commissioning
    • SR: What is the documented pipeline for CR rejection? The details matter. If it hasn't yet been written down, I would be happy to help with that. Need specific criteria for success with/without snaps.
    • KB: Fiducial plan for what we are doing at the start of commissioning - what is the default position 
    • YAS: The test that we would do is - make snaps, get calexp, match one image to another, do CR, match snap 1 to snap 1, detect CR, then do on both and compare. Don't need to the snap handling code in place to so this
    • KB: Note that another dimension of this discussion is impact of snaps on AOS performance and that we probably won’t know until during the AOS closed-loop validation step
  • Photo-z
    • MLG: Don't think we need to integrate RAIL into the science pipelines - it is very extensive. Brazillian team will take the Object catalog and give back photo-zs
  • Multi-scale postage stamps: 
    • EB: Host galaxy association and classif + glints are the 2 drivers from MS postage stamps. MS driven by keeping the size of the AP constant. Alerce pushed hard on this at the PCW. DMTN-199 is relevant here. We need to analyse this and send a formal response. 
    • EB concerned about scientific rationale and implementation. will do some tests in the coming months. 
  • JB: Shear / WL session - we are in sync with the DES folk from DESC but others in DESC were not aware of what we re doing wth them on the shear catalog and the implications for photo-z. Nothing here for us to do. 
  • Leanne Guy Schedule follow up of these topics at the SST in future   
Status of crowded field processing prototype

LPG: where were the in-kind post-docs "baffled" - technical, pipelines, scientific? 

ZI: Did the prototype work correctly with sim data but the problems appeared when trying to process real data?

CTS: Sims version did not do the multiple rounds of detection. Unit tests pass but they only test a single iteration of detection. 

ZI: have you used DAOPhot on data that could not be processed?

CTS: All testing was on DECAPS so there was a truth solution, yes

JB:  Have the tried to wrap DECAPS code - the most modern and wrappable off all code. 

CTS: Agree. Amazingly effective but the code is hard to work on. Have not thought about wrapping it yet.

JB: Fred has expressed interest in this, scientifically and technically, in particular from a deblending POV

YAS: Fred presented some other ideas in the Friday crowded fields PCW session 

EB: Option 4 - see if Scarlett with a strong PS prior yields reasonable results

JB: We don't understand what is going wrong

CTS: not sure it can do better than DAOPhot - DAOPhot makes most use of the information in the image

YAS: Wavelets! 

JB: PSF matched filtering is not the best solution in the presence of blending. 

LPG: Can we get help with option 1

JB: Like the idea of running one of the codes - but we have DECAPS results 

CTS: Option 1 - see this as a week of dedicated effort on this and no more. 

CTS: Some groups will run their own code (DAOPhot) - Option 3. 

JB: Any progress on doing this earlier in the pipelines. 

EB: Successful with a run on a crowed Decam field a few years back - getting it going at the USDF is slow, confidence level is moderate. Want to push on this fall. 

JB: Do a dRP / FGCM flavour of this as well. 

Wrap Schlafly's code - no poking at the inards, just the interface. CTS has not looked at this for a while. CTS could start by looking into this. 

LPG: Where do we think we need to be in Y1 

EB: Need to run AP in crowded fields - requirement in commissioning

JB: Build coadds in CFs  - always been a stretch goal, stay engaged with community so that they have something to try to make things better. Stretch goal for DR1. But not a stretch goal fo AP in Y1

CTS: Do not want this to take up our time in the runup to DR1 - hand a lot to the community to make progress. Cannot take high priority circa DR1 proecssing 

  • Yusra AlSayyad will look to see if there is any effort to help on option 1  

Next meeting is:  

List of SST tasks (Confluence)

DescriptionDue dateAssigneeTask appears on
  • Robert Lupton Clarify the meaning of time in the object table. 1 sentence description in sdm_schemas, can link to a short DMTN.  Update 2022-02-09: Meeting to resolve this on 2022-02-21  
28 Feb 2022Robert Lupton2018-11-05 DM SST F2F Agenda and Meeting notes
  • Gregory Dubois-Felsmann check if SDM standardization is adequately represented in project documents, and whether DMTN-067 should be required.
31 Mar 2022Gregory Dubois-Felsmann2022-02-14 DM-SST Virtual F2F Agenda and Meeting notes
  • Steve Ritz Work with DM and Camera to develop plans for delivering a shutter position-vs-time model  
16 May 2022Steve Ritz2022-03-14 DM-SST Agenda and Meeting Notes
  • Gregory Dubois-Felsmann  / Leanne Guy Create a TN that outlines the science use cases and options for compressed PVIs from AP. Present the issue at DMLT VF2F and then the PST.   
13 Jun 2022Gregory Dubois-Felsmann2022-05-09 DM-SST Agenda and Meeting Notes
  • Eli Rykoff Report on what information DES used for their decision on using compression?  
25 Jul 2022Eli Rykoff2022-06-06 DM-SST VF2F Agenda and Meeting notes
  • Melissa Graham to draft a proposal for including pz in alert packets  
12 Sep 2022Melissa Graham2022-08-15 DM-SST Agenda and Meeting Notes
26 Sep 2022Steve Ritz2022-09-12 DM-SST Agenda and Meeting Notes
  • Gregory Dubois-Felsmann  start a technote to write down the details for science end user interface to SED corrections in catalogs  
31 Oct 2022Gregory Dubois-Felsmann2022-08-22 DM-SST Agenda and Meeting Notes
31 Dec 2022Leanne Guy2022-06-06 DM-SST VF2F Agenda and Meeting notes
28 Feb 2023Leanne Guy2023-01-23 DM-SST Agenda and Meeting Notes
  • Leanne Guy talk to Steve R about presenting plans for the ShearObject table to PST and SciCollab chairs   
20 Mar 2023Leanne Guy2023-02-27 DM-SST Agenda and Meeting Notes
31 Mar 2023Jim Bosch2023-02-27 DM-SST Agenda and Meeting Notes
  • Leanne Guy  talk to Gregory Dubois-Felsmann to review the original intent of the AFS-related Portal requirements before deciding on a course of action  
29 May 2023Leanne Guy2023-05-01 DM-SST Focus Meeting - Brokers in Commissioning
  • Leanne Guy Prepare to consult the PST on the question of providing compressed PVIs for AP outputs, to cover the period before the data become available in a DR.  
02 Jun 2023Leanne Guy2023-03-27 DM-SST Agenda and Meeting Notes
  • Jim Bosch Incorporate 30-60 day period for raws on disk into the strawman proposal and present to KT  
26 Jun 2023Jim Bosch2023-05-08 DM-SST Agenda and Meeting Notes
  • Parker Fagrelius Patrick Ingraham  how long will it take to do a scan as described? No need to scan the whole WL range but will require additional points outside nominal lambda range.  
30 Jun 2023Parker Fagrelius2023-03-27 DM-SST Agenda and Meeting Notes
31 Jul 2023Colin Slater2023-07-10 DM-SST Agenda and Meeting Notes
  • Eli Rykoff , Leanne Guy  Develop a proposal for what calibration processing, hardware, data we actually need and what will be needed for DR1. This has implications for the ORR and for prioritisation of work in commissioning  
31 Jul 2023Eli Rykoff2023-01-30 DM-SST Agenda and Meeting Notes
  • Yusra AlSayyad will look to see if there is any effort to help on option 1  
28 Aug 2023Yusra AlSayyad2023-08-14 DM-SST Agenda and Meeting Notes
  • Jim Bosch  Provide a physical example of that a  up on cell table would look like fo the Colin Slater / DAX team to review  
31 Aug 2023Jim Bosch2023-02-27 DM-SST Agenda and Meeting Notes