plot_standard_ASTM_G173-03.py

"""
ASTM G173-03 Standard Spectrum
==============================

This example demonstrates how to read the data from the ASTM G173-03 standard
spectrum bundled with pvlib and plot each of the components.

The ASTM G173-03 standard provides reference solar spectral irradiance data.
"""

import matplotlib.pyplot as plt
import pvlib


# %%
# Use :py:func:`pvlib.spectrum.get_standard_spectrum` to retrieve a
# standard spectra file.

am15 = pvlib.spectrum.get_standard_spectrum(standard="ASTM G173-03")

# Plot
plt.plot(am15.index, am15['extraterrestrial'], label='Extraterrestrial')
plt.plot(am15.index, am15['global'], label='Global')
plt.plot(am15.index, am15['direct'], label='Direct')
plt.xlabel(r'Wavelength $[nm]$')
plt.ylabel(r'Irradiance $[\frac{W}{m^2 nm}$')
plt.title('ASTM G173-03 Solar Spectral Irradiance')
plt.legend()
plt.grid(True)
plt.tight_layout()
plt.show()