ATOMIC TIME SCALES TAI AND TT(BIPM): PRESENT STATUS AND PROSPECTS

摘要

We review the stability and accuracy achieved by the reference atomic time scales TAI and TT(BIPM). We show that they presently are at the level of a few 10~(-16) in relative value, based on the performance of primary standards, of the ensemble time scale and of the time transfer techniques. We consider how the 1X10~(-16) value could be reached or superseded and which are the present limitations to attain this goal.