| cal_angerFromSouth {simET} | R Documentation |
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)