geodata.pv.orientation.SurfaceOrientation
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.. py:function:: geodata.pv.orientation.SurfaceOrientation(ds, solar_position, orientation)

   Compute cos(incidence) for slope and panel azimuth

   .. rubric:: References

   [1] Sproul, A. B., Derivation of the solar geometric relationships using
   vector analysis, Renewable Energy, 32(7), 1187–1205 (2007).