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net.simplace.sim.components.util.helper.AstronomicParametersCalculator

Methods for calculating daylength and diurnal values

Includes methods for integration/normalization/rescaling of piecewise linear functions, as well as methods for calculating diurnal values for radiation and temperature.

Reference

(G) Goudriaan, Modeling Potential Crop Growth Processes, 1994, (revised version Nov. 2004)

public class AstronomicParametersCalculator {
// Public Constructors
public AstronomicParametersCalculator();

// Class Methods

public static HashMap AstronomicParameters(int doy, double latitude);

Calculates day length and other parameters from DOY and latitude

doy Day of year (from 1 to 366)
latitude Latitude in degrees

returns HashMap with values for Daylength, PhotoperiodicDaylength, SolarConstant, a, b, DSINB, DSINBE, SinBetaArea

public static HashMap AstronomicParameters(int doy, double latitude, double
inclination);

Calculates day length and other parameters from DOY, latitude and sun inclination

doy Day of year (from 1 to 366)
latitude Latitude in degrees
inclination Sun inclination in degrees

returns HashMap with values for Daylength, PhotoperiodicDaylength, SolarConstant, a, b, DSINB, DSINBE, SinBetaArea

}