Huraian
The URSI Register is a comprehensive and up-to-date survey of National Standards Laboratories, the types of measurement they can make, their results and other relevant calibration facilities. The register consists of an entry for each National Laboratory, usually in the following format: organisation, national standards, calibration facilities. The coverage of electromagnetic metrology is comprehensive and includes measurements of time and frequency, of DC and LF electrical and magnetic quantities, and of radio and microwave frequencies with extensions where appropriate to infrared and optical frequencies.