This part of IEC 61788 describes measurement of the surface resistance of superconductors at microwave frequencies by the standard two-resonator method. The object of measurement is the temperature dependence of Rs at the resonant frequency.

The applicable measurement range of surface resistances for this method is as follows:

- Frequency: 8 GHz < f < 30 GHz

- Measurement resolution: 0,01 milliohm at 10 GHz.