BuildSysPro.IBPSA.BoundaryConditions.SolarGeometry.ZenithAngle

# .BuildSysPro.IBPSA.BoundaryConditions.SolarGeometry.ZenithAngle

Zenith angle

## Information

This component computes the zenith angle, which is the angle between the earth surface normal and the sun beam. For a definition of the parameters, see the User's Guide IBPSA.BoundaryConditions.UsersGuide.

## Revisions

- September 6, 2021, by Ettore Zanetti:
  Changed `lat` from being a parameter to an input from weather bus.
  This is for IBPSA, #1477.
- February 25, 2012, by Michael Wetter:
  Changed model to get declination angle and solar hour angle from weather bus.
- May 17, 2010, by Wangda Zuo:
  First implementation.

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