Calculates 12-hour circadian process.

TPM_Ufun(Um, Ua, p, tod)

Arguments

Um

Mesor of U process (typically = -0.5)

Ua

Amplitude of U process (typically = 0.5)

p

Default C phase (i.e., time of peak typically 16.8)

tod

Time of day (in decimal hours)

Value

U