_RL exf_inscal_tidePot
& exf_inscal_tidePot,
I exf_inscal_tidePot,
I tidePotPeriod, exf_inscal_tidePot, tidePotconst,
& exf_inscal_tidePot, exf_outscal_tidePot,
exf_inscal_tidePot = 1. _d 0