pvlib.solarposition.hour_angle

pvlib.solarposition.hour_angle(times, longitude, equation_of_time)

Hour angle in local solar time. Zero at local solar noon.

Parameters:

• times (pandas.DatetimeIndex) –

  Corresponding timestamps, must be localized to the timezone for the longitude.

  A pytz.exceptions.AmbiguousTimeError will be raised if any of the given times are on a day when the local daylight savings transition happens at midnight. If you’re working with such a timezone, consider converting to a non-DST timezone (e.g. GMT-4) before calling this function.

• longitude (numeric) – Longitude in degrees

• equation_of_time (numeric) – Equation of time in minutes.

Returns:

hour_angle (numeric) – Hour angle in local solar time in degrees.

References

[1]

J. A. Duffie and W. A. Beckman, “Solar Engineering of Thermal Processes, 3rd Edition” pp. 13, J. Wiley and Sons, New York (2006)

[2]

J. H. Seinfeld and S. N. Pandis, “Atmospheric Chemistry and Physics” p. 132, J. Wiley (1998)

[3]

Daryl R. Myers, “Solar Radiation: Practical Modeling for Renewable Energy Applications”, p. 5 CRC Press (2013)

See also

equation_of_time_spencer71, equation_of_time_pvcdrom