nautical_twilight.Rd
Nautical twilight
nautical_twilight(date, lon, lat)
date | The date to compute the length for. An R DateTimeClasses object
or something that can be coerced into one by |
---|---|
lon, lat | longitude & latitude |
(dbl) nautical twilight
# NOT RUN { nautical_twilight("2019-12-31", -70.8636, 43.2683) # }