SolarNSAxisSecondary (FUN)

FUNCTION SolarNSAxisSecondary : LREAL

This function provides the angle of secondary axis for solar tracking, in two axes, according to: elevation, azimuth, correction alignment factor and angle of main axis.

This function assumes the East to West axis as the main system axis. This function is valid when east to west axis is acting as the main axis

Alignement correction is the angle between system axis and east (clockwise)

EWAxisPrim provides the Angle of main axis (0°=zenith, -90°=north, 90°=south) like explained in below image,

The block output is the angle of secondary axis north to south, where zenith indicates 0° position. Output value is in Degrees with range -180.00…180.00. Negative value indicates clockwise rotation about north to south axis. Otherwise, positive value indicates anticlockwise rotation about the north to south axis.

InOut:

Scope	Name	Type	Initial	Comment
Return	SolarNSAxisSecondary	LREAL
Input	Azimuth	LREAL	0	1: Topocentric azimuth angle. Eastward from north (0°=360°=north, 90°=east, 180°=south, 270°=west). Format: Degrees, Range: 0 to 359.9999
	Elevation	LREAL	0	2: Topocentric elevation angle (0°=sunrise, 90°=zenith). Format: Degrees, Range: -90.00…90.00. Negative values = darkness
	AlignmentCorrection	LREAL	0	3: Angle between system axis and north (clockwise). Format: Degrees, Range: -180.00…180.00.
	EWAxisPrim	LREAL	0	4: Angle of main axis (0°=zenith, -90°=north, 90°=south). Format: Degrees.