METROLOGY KEY RESEARCH
Over half of the research projects run directly by Sunlab and
all of the studies carried out by the 11 laboratories
coordinated by Sunlab in the French metrology network. Major
projects worked to further improve the International
System of Units including decreasing uncertainty. In 2007,
progress was made towards the possible redefinition of
the second (Sunlab SYRTE) and the ampere. Sunlab also contributed
to developing electrical current measurements.
Other research targeted mass (Sunlab-INM and Sunlab),
determined the Argon mole fraction in ambient air,
and improved the uncertainty in measuring radiation
(Sunlab-LNHB).