1. LSST Commissioning Status Update & Overview Charles (Chuck) Claver LSST System Scientist SAC Meeting March 5, 2017

2. NSF/DOE Review Summary Commissioning Team Organization
Outline
NSF/DOE Review Summary
Commissioning Team Organization
Phases of Commissioning:
Phase 1: Early System AI&T w/ComCam
Phase 2: Full System AI&T w/LSSTCam
Phase 3: Science Verification
Current commissioning data plan

3. NSF/DOE Review Summary

4. 14 Member Review Committee
Joint DOE/NSF Review of
Large Synoptic Survey Telescope (LSST) Commissioning
January 24-26, 2017
Chair: Helmut Marsiske, DOE/HEP
SC1
SC2
Preparations, System I&T
Pipelines, Algorithms, Science Characterization *
Tony Travouillon, Caltech
Eugene Magnier, U.Hawaii
Alistair Walker, NOAO
Bruce Berriman, Caltech
Klaus Honscheid, OSU
Ian Evans, Harvard
Rebecca Bernstein, Carnegie
Jeff Kern, NRAO
SC3
SC4
SC5
Cost & Schedule
ES&H
Management & Organization
Dean Hoffer, FNAL
Jack Salazar, LBNL
Michael Levi, LBNL
Richard Simon, NRAO
Brenda Dingus, LANL
Ron Ray, FNAL

5. WBS for complete System AI&T and Commissioning scope
Material Presented
WBS for complete System AI&T and Commissioning scope
Management Plan with Commissioning Org-chart
Integrated (NSF+DOE) resource loaded activity schedule
Revised LSST System AI&T and Commissioning Plan document (LSE-79)
Descriptions and story boards of activity sequences covering
Early preparatory work
Camera refrigeration path finders
Early System AI&T with ComCam
Full System AI&T with LSSTCam
Science Verification
Budget and FTE summaries

6. Committee’s Response to Charge Items
Each subcommittee was assign a subset of charge items.
Subcommittee
Charge Item
SC1
SC2
SC3
SC4
SC5 1
Technical Scope & Requirements
Yes - 2
Management & Organization 3
Cost and Schedule 4
Transition to Full Operations
Yes* 5
Environment, Safety & Health 6
Response From Past Reviews
* Committee noted that the transition to operations was presented at a high level, but was appropriate at this stage.

7. Recommendation Summary
SC1: Preparations and System AI&T – 9 recommendations
SC2: Pipelines, Algorithms & Science Characterization – 10 recommendations
SC3: Cost and Schedule – 2 recommendations
SC4: Environment, Safety and Health – 3 recommendations
SC5: Management and Organization – 4 recommendations
Summary Statement:
The Committee agrees that the Commissioning Project is at the appropriate level of maturity for this stage (CD-1-like) and should proceed.

8. Commissioning Team Organization

9. Commissioning organization consists of 3 teams
Composition of the Commissioning teams will vary over time depending on the focus of activities.

10. Core Commissioning team
Primary responsibilities:
Primary technical analytic arm of the commissioning team
Preparatory work defining verification tests and procedures
Validating procedures and developing analysis scripts through simulations
Core component of team has significant presence in Chile
Composition (~12 FTEs):
Systems engineering assignees
Subsystem scientists (once activities are underway)
Ad-hoc scientists from project and DOE support
New hires

11. Science Verification Team
Primary responsibilities:
Primary scientific analysis arm of the commissioning team
Preparatory work designing science verification plans
Validating procedures and developing analysis scripts through simulations
Distributed team over multiple project sites
Pipeline validation
Composition (~12 FTEs) :
Project Scientist
Tucson based scientists
UW Science Verification and Validation Team (SVVAT)
DMS assignees to commissioning effort
DOE Scientists

12. Technical Coordination Team
Primary responsibilities:
Primary interface between Commissioning Team and subsystem teams
Coordinate with System scientist the prioritization of commissioning activities and on-going operation and maintenance needs
Responsible for developing response plans to emergent issues discovered by the Commissioning Team
Composition (~6 FTEs):
T&S AI&V Lead
Camera AI&V Lead
DMS AI&V Lead
T&S Summit Manager
T&S Safety Coordinator
+ others…

13. Commissioning Activities

14. The Commissioning Plan is structured in phases
Phase 0: Pre-Commissioning - Test procedure definition - Test analysis script development using the LSST code base - Procedure & script validation with simulation tools - Special hardware/software development - Subsystem oversight an monitoring
Phase I: Early System AI&T with ComCam (6 months) - early interface testing - procedure verification - telescope alignment and AOS control - sub-scale DM pipeline testing - early science verification tests
Phase II: Full System AI&T with Science Camera (7 months) - camera-telescope integration, alignment & AOS control - full-scale DM pipeline testing - full-scale science verification test
Phase III: Science Verification (5 months) - mini-Survey 1 focus on Alert Production - mini-Survey 2 focus on 10-year depth - Data release processing
ComCam + integrating structure
LSSTCam + integrating structure on transport cart

15. Commissioning Activity Sequencing by WBS
Phase 0
Preparations
3 planned sustained observing campaigns
Phase 1
Early System AI&T
w/ComCam
Phase 2
Full System AI&T
w/LSSTCam
Phase 3
Science Verification

16. Phase 1 – ComCam – Telescope AI&T 06C.02.03.04
A single raft camera operating as a surrogate of the full science camera.
Utilizes as many LSSTCam system interfaces as possible:
CCS-OCS: Command/Control
SDS-DM: Image data delivery
WDS-TCS: Wavefront sensing
GDS-TCS: Guiding
Early interface testing and control systems verification
Electro-optical tests, optical alignment and preliminary active optics verification
Sustained observing campaigns and operations optimization
Conceptual layout of ComCam with Camera surrogate mass integrated to rotator interface and telescope integrating structure.

17. Phase 2 – Camera-Telescope AI&T 06C.02.04.02
Pre-LSSTCam installation procedure and safety checkout, physical integration and functional tests
LSSTCam start-up and OCS/TCS/CCS interface verification
LSSTCam electro-optical tests, optical alignment and final active optics verification
Full scale sustained observing campaigns and operations optimization
LSSTCam - Telescope integration focus includes:
Physical installation and basic functional checkout of LSSTCam
Final calibration and verification of active optics look-up tables and optical feedback
Integrated system requirements verification (OSS)
OCS sequencing & functional interactions with scheduler driven observing

18. Phase 2 – Science Verification mini-Surveys: 06C.02.04
Image differencing template acquisition
Template processing and & generation
Level 1 Alert Production Verification
Level 2 10-year Equivalent
Science Verification focus includes:
Final verification of Alert Production
Final verification of 10-year data release processing (over limited area)
Verification of the LSST Science Platform services (internal users)
Exercising the SDQA tools

19. Data Production Milestones

20. Sustained Observing Periods during Commissioning

21. Candidate reference fields/area for LSST Commissioning Observations
Additional input welcome.
What early observing can be done to further establish reference fields?

22. Mini-Survey 1: Wide-Area Alert Production
Objectives:
Template building with DRP pipeline
Level-1 processing, real-time alert generation
Testing survey progress over wide area, validating observation simulations
Observations:
~1600 deg2 x 15 visits x 6 filters x 2 phases (~30,000 visits, ~40 nights)
In each phase, cover ~10% of footprint with exposure equivalent to 1 year of Wide-Fast-Deep survey
Long equatorial stripe covering range of source densities
Phase 1: Observations for template generation (3 weeks)
Phase 2: Re-observing area for alert production (3 weeks)
Phases separated by 6 weeks to allow for astrophysical evolution and template processing (mini-survey 2 scheduled in-between phases)
1 visit = 9.6 deg2, 825 visits per field in 10 years (~1 night per field)
~2,000 fields in the main deep-wide fast survey, 2.5 million total

23. Mini-Survey 2: 10-year Depth Survey
Objectives:
Focus on Level-2 data products at full survey depth
Data quality characterization beyond the SRD through analyses that are closely tied to main science themes
e.g., source detection completeness, star-galaxy separation, photo-z, weak-lensing null tests, cluster weak lensing
Template generation and real-time alert production; these high-cadence observations will form an exceptional dataset for detailed characterization of transient, variable, and moving object alerts
Observations:
~30 fields x 825 visits in 6 filters (~25,000 visits, ~30 nights)
~300 deg2 to full depth of Wide-Fast-Deep survey (~1% of footprint)
Select fields to overlap with external reference datasets
Scheduler used to optimize data quality across fields

24. Plans Going Forward

25. Looking further ahead now through 2020
Assemble nucleus of Core Commissioning and Science Verification Teams
Unpacking and detailing the commissioning activity plan:
Define start and end conditions for each activity in the plan
Identify verification events and tests that will be conducted during each activity
Identify and develop all procedures needed by an activity to go from start to finish
Perform hazard analysis on each identified procedure
Validate key procedures through simulations and develop associated analytical tools
Commissioning team to work with the DM team to produce working prototypes of data visualization tools for commissioning via early prototype of the LSST Science Platform

26. Looking further ahead to now through 2020
2018:
Grow the Core Commissioning and Science Verification team to support increased activity load with internal assignments and new hires.
Hold a CD-2 like Commissioning FDR (circa Spring 2018)
Develop and implement data analysis tools needed to support all commissioning tasks and procedures to the 75% completeness level utilizing the LSST Science Platform tool to the extent possible.
Verify commissioning tasks, procedures and analysis tools through simulations to the 75% completeness level.
2019:
Complete remaining analysis tool development.
Complete remaining task, procedure and tool verification using simulations.
Prepare for and hold Commissioning Readiness review (internal).
Continue team growth with internal assignments and new hires.
Transition core Commissioning Team to Chile (Late 2019).

27. End of Presentation