Radio-controlled timepiece and method of controlling radio-controlled timepiece

A control method for a radio-controlled timepiece, the radio-controlled timepiece including:

• a first oscillating unit configured to oscillate at a first frequency and output a first clock signal,
• a time measuring unit configured to operate using, as a first reference signal, the first clock signal,
• a receiving unit including a second oscillating unit and configured to receive radio waves including time information, a second frequency of the second oscillating unit being less temperature-dependent than that of the first oscillating unit and the second oscillating unit being configured to oscillate at the second frequency and output a second clock signal,
• a temperature acquiring unit configured to acquire temperature data, and
• a storage unit configured to store temperature compensation data, the control method comprising:
• causing at least part of the receiving unit including the second oscillating unit to operate to output the second clock signal from the second oscillating unit;
• measuring an oscillation frequency of the first oscillating unit using, as a second reference signal, the second clock signal output from the second oscillating unit;
• activating the temperature acquiring unit and measuring the temperature data;
• calculating the temperature compensation data for the first oscillating unit based on the oscillation frequency of the first oscillating unit and the temperature data;
• and
• storing the temperature compensation data in the storage unit.