Working Groups
TASK GROUP CLOSED
This Task Group completed its task and was dissolved in May 2024.
CCU Task Group on angle and dimensionless quantities in the SI Brochure (CCU-TG-ADQSIB)
Chair
Head of Metrology
National Physical Laboratory
United Kingdom
Executive Secretary
Director of the Physical Metrology Department
Bureau international des poids et mesures
France
Meetings and related documents
Terms of reference
Acknowledging the current status of angle within the SI Brochure as not being a base unit
- review the 9th Edition of the SI Brochure and highlight the parts (text, tables, footnotes, etc) relevant to angle and dimensionless quantities;
- decide whether the parts identified could be improved to aid understanding;
- attempt to reach consensus on updated entries for those parts where improvement would be beneficial;
- consider whether a new, additional Appendix to the SI Brochure would be useful to explain more fully the special considerations for angle and dimensionless quantities;
- review the historical use of SI supplementary units and consider whether reintroduction would be of benefit (for the units radians, steradians and one);
- present the outcomes in the form of a short report and list of proposals to the next CCU meeting and also provide progress updates to the CCU Working Group on Strategy.