pvlib.tracking.calc_cross_axis_tilt#
- pvlib.tracking.calc_cross_axis_tilt(slope_azimuth, slope_tilt, axis_azimuth, axis_tilt)[source]#
Calculate the angle, relative to horizontal, of the line formed by the intersection between the slope containing the tracker axes and a plane perpendicular to the tracker axes.
Use the cross-axis tilt to avoid row-to-row shade when backtracking on a slope not parallel with the axis azimuth. Cross-axis tilt should be specified using a right-handed convention. For example, trackers with axis azimuth of 180 degrees (heading south) will have a negative cross-axis tilt if the tracker axes plane slopes down to the east and positive cross-axis tilt if the tracker axes plane slopes down to the west.
- Parameters:
slope_azimuth (float) – direction of the normal to the slope containing the tracker axes, when projected on the horizontal [degrees]
slope_tilt (float) – angle of the slope containing the tracker axes, relative to horizontal [degrees]
axis_azimuth (float) – direction of tracker axes projected on the horizontal [degrees]
axis_tilt (float) – tilt of trackers relative to horizontal.
axis_tiltmust be >= 0 and <= 90. [degree]
- Returns:
cross_axis_tilt (float) – angle, relative to horizontal, of the line formed by the intersection between the slope containing the tracker axes and a plane perpendicular to the tracker axes [degrees]
Notes
See [1] for derivation of equations.
References
