AixLib.BoundaryConditions.SolarIrradiation.BaseClasses.RelativeAirMass

# .AixLib.BoundaryConditions.SolarIrradiation.BaseClasses.RelativeAirMass

Relative air mass

## Information

This component computes the relative air mass for sky brightness.

#### References

R. Perez (1999). Fortran Function irrpz.f, Emailed by R. Perez to F.C. Winkelmann on May 21, 1999.

## Revisions

- September 6, 2021, by Ettore Zanetti:
  Changed `lat` from being a parameter to an input from weather bus.
  This is for IBPSA, #1477.
- May 2, 2021, by Ettore Zanetti: Introduced altitude attenuation for relative air mass calculation. This is for IBPSA, issue 1477.
- April 27, 2018, by Michael Wetter:
  Corrected `displayUnit`.
  This is for IBPSA, issue 912.
- July 07, 2010, by Wangda Zuo:
  First implementation.

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