BuildSysPro.IBPSA.BoundaryConditions.SolarGeometry.BaseClasses.ZenithAngle

# .BuildSysPro.IBPSA.BoundaryConditions.SolarGeometry.BaseClasses.ZenithAngle

Zenith angle

## Information

This component computes the zenith angle, which is the angle between the earth surface normal and the sun's beam. Input are the solar hour angle and the declination angle.

## Revisions

- September 6, 2021, by Ettore Zanetti:
  Changed `lat` from being a parameter to an input from weather bus.
  This is for IBPSA, #1477.
- January 5, 2015, by Michael Wetter:
  Updated comment of the input connector as this is used in the weather bus connector. This is for issue 376.
- Dec 7, 2010, by Michael Wetter:
  Rewrote equation in explicit form to avoid nonlinear equations in room model.
- May 17, 2010, by Wangda Zuo:
  First implementation.

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