cal_angerFromSouth: Calculating anger from south

In simET: Tools for Simulation of Evapotranspiration of Field Crops and Soil Water Balance

Calculating anger from south

Description

A parameter used to determine the position of the sun relative to the observer (the other one is solar inclination).

Usage

cal_angerFromSouth(latitude, solar_altitude, solar_declination)

Arguments

latitude	is the latitude data (Radian).
solar_altitude	It can be calculated from pi/2-cal_solarinclination.
solar_declination	is solar declination anger. It can be calculated from cal_solardeclination()

Details

The minus and positive signs are taken before and after solar noon, receptively. The reason for having the positive-and-negative signs is merely an artificial convention so that we are able to distinguish between the sun lying westwards (posite angles and after solar noon) and eastwards (negative angles and before solar noon).

Value

A vector for anger from south (Radian)

References

Teh CBS.Introduction to mathematical modeling of crop growth: How the equations are derived and assembled into a computer model. Brown Walker Press, 2006.

Examples

cal_angerFromSouth(latitude=0.52,solar_altitude=-0.715,solar_declination=-0.2974005)

simET documentation built on Aug. 19, 2023, 5:09 p.m.