ws {MeTo} | R Documentation |
Sunset hour angle for given latitude and solar declination (SolarDec
).
ws(x, lat.rad)
x |
date-time object or day of the year |
lat.rad |
latitude [rad] |
must be provided as number (1-366) or as a common date-time object (e.g, POSIXct, POSIXlt or Date objects). All formats for which is.timepoint from the lubridate package returns TRUE can be used
Sunset hour angle
eq. 25 of reference
Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. FAO, Rome, 300(9).
ws(x = 246, lat.rad = -0.35)