Reports of evaluation of Primary and Secondary Frequency Standards

Clocks and time transfer files by year


For more information please see the Readme file

time data copyright info

IMPORTANT: The data sent to the BIPM by the UTC laboratories are provided for the computation by the BIPM of UTC, UTCr, and related timing products. The data remain the property of the contributing laboratories, and permission should be obtained from the relevant UTC laboratories before any other use is made of their data.