_RL swfluxperiod
& swfluxperiod, swfluxStartTime,
I swfluxStartTime, swfluxperiod, swfluxRepCycle,
I 'exf', 'swflux', swfluxperiod,
I swfluxperiod, exf_inscal_swflux, swfluxconst,
& swfluxRepCycle, swfluxperiod, swfluxStartTime,
swfluxperiod = 0.0 _d 0
I swfluxfile, swfluxRepCycle, swfluxperiod,