Shading

shading.ground_angle(surface_tilt, gcr, ...)	Angle from horizontal of the line from a point on the row slant length to the bottom of the facing row.
shading.masking_angle(surface_tilt, gcr, ...)	The elevation angle below which diffuse irradiance is blocked.
shading.masking_angle_passias(surface_tilt, gcr)	The average masking angle over the slant height of a row.
shading.sky_diffuse_passias(masking_angle)	The diffuse irradiance loss caused by row-to-row sky diffuse shading.
shading.projected_solar_zenith_angle(...)	Calculate projected solar zenith angle in degrees.
shading.shaded_fraction1d(solar_zenith, ...)	Shaded fraction in the vertical dimension of tilted rows, or perpendicular to the axis of horizontal rows.
shading.direct_martinez(poa_global, ...)	A shading loss power factor for non-monolithic silicon modules and arrays with an arbitrary number of bypass diodes.