EcoHydRology (version 0.4.12.1)

PotSolarInst: Instantaneous Potential Solar Radiation

Description

Potential Solar Radiation at a particular time of day. Defaults to W/m2, can also report in kJ/m2/d if units set to kJ/m2/d

Usage

PotSolarInst(Jday, hour = 12, lat = 42.44 * pi/180, sunrise = NULL,
 sunset = NULL, SolarNoon = mean(c(sunrise, sunset)), units = "Wm2",
 latUnits = "unknown")

Arguments

Jday

Day of the year [-]

hour

Time of the day in hours [0-24 hr]

lat

latitude. Default is radians, but will automatically convert from degrees if value is larger than 1.62 or less than -1.62

sunrise

Time of sunrise used to calculate solar noon [0-24 hr]

sunset

Time of sunset used to calculate solar noon [0-24 hr]

SolarNoon

Time of solar noon. Can be calculated from sunrise and sunset times. [hr]

units

Units of the result. Defaults to W/m2

latUnits

Latitude units can be explicitly stated here, options are 'radians', 'degrees' or default is 'unknown', which will assume radians unless the absolute value of lat is greater than pi/2

References

Lawrence Dingman. Physical Hydrology. Waveland Press, Inc. Illinois, 2002.

Examples

# NOT RUN {
PotSolarInst(Jday=150, hour = 15, lat = 42.44, SolarNoon = 12.5) 
PotSolarInst(Jday=c(1,50,100,150), hour = c(9,10,12,17), lat = -pi/4, SolarNoon = 12.5) 

# }