SolarEWAxisSecondary (FUN)

FUNCTION SolarEWAxisSecondary : LREAL

This function provides the angle of secondary axis for solar tracking, in two axes, according to: azimuth, elevation, correction alignment factor and angle of main axis. This function is valid when north to south axis is acting as the main axis..

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

NSAxisPrim provides the Angle of main axis (0°=zenith, -90°=east, 90°=west) like explained in below image,

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

InOut:

Scope	Name	Type	Initial	Comment
Return	SolarEWAxisSecondary	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.
	NSAxisPrim	LREAL	0	4: Angle of main axis (0°=zenith, -90°=east, 90°=west). Format: Degrees.