Description:
Frequency of fluctuations (F1 = frequency of 1 or period of 144 hours; F3 = frequency of 3 or period of 48 hours; F6 = frequency of 6 or period of 24 hours; F18 = frequency of 18 or period of 8 hours; F24 = frequency of 24 or period of 6 hours; CON = constant temperature)