SGN F2F LIGO Hanford – September 28 - September 30, 2026

We will meet to full days Monday through Wednesday to discuss pressing SGN work for IR1. It is expected that there will be time for longer term planning and development to occur too. The schedule reflects both but we may have to triage.

We will meet in the LHO OSB Conference Room. The following people will have cars available to carpool to and from the site

Jameson Rollins (4 additional seats)
Chad Hanna (3 additional seats)
Maddie Wade (3 additional seats)

The recommended hotel is Homewood Suites by Hilton Richland near the river. There are no official dinner or outings planned outside of business hours but it is likely that people will join one another for dinner, etc. in the area near Homewood Suites in the evenings.

Schedule:

All times are pacific time. The site is remote without amenities and people should plan to pack supplies that might be needed throughout the day. We may at the group’s discretion stay slightly later on site if needed.

Monday 9/28

9:00 Welcome and overview
9:30 General IR1 readiness
10:30 State of the replay, results reporting
11:00 Vision for the replay going forward: RAPR as a service.
- How our infrastructure relates to the collaboration’s E2E goals
- Replay restart button
- Hardening the replay as a service
- What would we like a validation run to look like?
- How to add injections to the replay
- Write a paper on the replay
12:00 LHO commissioners will need use of the conference room, but SGN folks are invited to stick around
1:00 - 5:00 Hacking and small group collaboration time
- SGNL:
  - sgnl boot
  - GPU analysis running
  - RTPE and updated p-astros
  - Final configuration tweaks for e.g., pastro?
  - automated tests suitable for review sign-off
  - Profiling and benchmarking. Have we really optimized our code? (a critical look at the GPU perf branches)
  - virgo dtype
5:00 - 5:30 Closeout, recap of small group effort and plans / visions for tomorrow

Tuesday 9/29

9:00 framework discussion (all morning)
- Monitoring
  - Reining in visualization and monitoring (sgmon, testpoint, skig, …)
- Source / sink proliferation issues
  - Rein in source and sink elements that have been implemented multiple times in different repos (kafka, frames, etc)
  - Move to sgn-gwframe
- The Olivia Revolution
- EOS handling?
1:00 - 5:00 Hacking and small group collaboration time
5:00 - 5:30 Closeout, recap of small group effort and plans / visions for tomorrow

Wednesday 9/30

9:00 Grand vision for the future
- MCP servers
- Agentic workflows
- Sgn-idq – what would that look like and what is useful to maintain?
10:00 SGNL review call
12:00 Lunch talk Journal club on broad scientific ambitions of the SGN group from calibration to searches to data quality / dq etc. (Yun-Jing, Zach, ???)
1:00 - 5:00 Hacking and small group collaboration time
5:00 - 5:30 Closeout, recap of small group effort and plans. Meeting adjourns!

Attendance