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LGC v2.7 - Discussions about next priorities
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Europe/Zurich
926/1-007 (CERN)
926/1-007
CERN
LGC Development meeting (11.05.2023)
Attendees: J. Gutekunst, G. Kautzmann, F. Klumb, V. Vlachakis
Meeting of the LGC Dev. team about the priorities for the versions of LGC after v.2.6.0.
Goals:
- Where do we stand? Recap of the last year
- Set preliminary objectives for the upcoming year
- Prepare the next WG Software
- Feeback on the organisation
Discussions:
- Free adjustment:
- Juergen mentioned his current work.
- Allowing the use of frames in a LIBR computation.
- Constraint generator to be refactored. A hint can be the use of the CONSI Checks to set some DOFs.
- "Libre Ajusté":
- First beta version is almost done and will be provided to specific users.
- Mathematics are not that complex, but the usability is
- The general implementation could resolve some of the tickets (*LONGI, *VERTI, etc...)
- A full workflow should be implemented, LGC shall be as general as possible and external pre-processing shall be developed (turn ellipsoid, taking a full covariance or other solution).
- The N-1 could be interesting to store to do multi-epoch computations (deform, etc..) : Vasileios proposed to have a look at the RINEX Standard.
- Fixed values as observations:
- centrage forcé and LGC fixed value could be treated as observation for better error propagation. The necessity should be assessed.
- Line adjustable object:
- A line adjustable object should be developed for the use of a plumb line, WPS.
- Taking into account all orientations of the wire, sag effects and Geoid effect. After a Discussion with B. Weyer, a line coherent model of a line would be needed after the EYETS 2023 (Specifications to be clarified)
- CSAG:
- Would be needed for April 2024
- SLAVE keyword shall be available for v2.6.0
- Going Open Source:
- Will be seen once the OS office at CERN will be opened
- 2 things to consider: keep control of the master branch, define a user base
- Scripts:
- Vasileios is interested in the development once a framework will be available
- A CHABA Script was evoked
- PLGC:
- Juergen proposed to have a direct replacement in LGC2 using a step-size penalisation scheme
- Organisational Feedback: For now no improvement identified. Maybe a more clear way to approve a merge request.
- A simplification of the current serialized helmert transformation covariance shall be provided for v2.6.0
For version v2.6.0: Serialization finishing touches (Helmert transfo cov, cov in root, IDs) , SLAVE, CONSI upgrade, contribution adding bug,
As a preliminary next step for the v2.7.0 and general priorities:
- will be refined in the next WG Software
- Guillaume: Less LGC coding, 3D computation (Low-Beta), training to organise in fall 2023
- Vasileios: Write the documentation for the serialization, Day to day Jira Ticket (TRGT handling for v2.7.0) and start the studies for the Line adjustable objects
- Juergen: FRAS, LIBR Ticket, Studies of libre ajusté, Observation in subframe, automatic derivative
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