Measurement accuracy at radio frequencies

The interdependence of science and technology and measurement capability is especially significant in measurements at radio frequencies. An example of this symbiotic relationship involves microwave spectroscopy and quantum electronics. Accuracy of measurements at radio frequencies is highly critical in satellites and similar craft. Growing international cooperation in the exploitation of satellites for research and other peaceful uses has developed concern over compatiblity of international radio frequency measurements. Accordingly, the International Bureau of Weights and Measures in 1965 initiated a program to improve the techniques of measuring electrical quantities at radio frequencies.