bsrn.physics.geometry.get_bni_extra

bsrn.physics.geometry.get_bni_extra(times)

Calculates extraterrestrial beam normal irradiance ($BNI_E$, $E_{0n}$) using Spencer (1971) [1].

Parameters:

times (pd.DatetimeIndex) – Times for calculation.

Returns:

bni_extra – Extraterrestrial beam normal irradiance ($E_{0n}$). [W/m^2]

Return type:

pd.Series

References

[1]

Spencer, J. W. (1971). Fourier series representation of the sun. Search, 2, 172.