Abstract :
The author shows that because time and frequency are the most accurately measured physical quantities, it is desirable to tie other physical quantities to time and frequency measurements. A review of the progress that has been made in this direction along with speculation on possibilities for the future are given. The role of time and frequency in a wide range of measurements is discussed, particularly those involving the International System of Units (SI) and fundamental physical constants
Keywords :
constants; frequency measurement; measurement standards; time measurement; units (measurement); International System of Units; SI; electrical variables measurement; frequency measurements; fundamental physical constants; length; magnetometry; mass spectrometry; measurement units; time measurement; velocity; Assembly; Extraterrestrial measurements; Frequency measurement; International Committee; Marine vehicles; Metrology; Particle measurements; Thermodynamics; Time measurement; Weight measurement;
