netCDF
How to deal with netCDF data on Ubuntu Linux
2022/10/09, 2020/12/09 Kenlo Nasahara
Exercise with solar spectrum data (TSIS-1 Hybrid Solar Reference Spectrum)
$ wget https://lasp.colorado.edu/lisird/resources/lasp/hsrs/hybrid_reference_spectrum_p005nm_resolution_c2021-03-04_with_unc.nc (then you get the netCDF file) $ ncdump hybrid_reference_spectrum_p005nm_resolution_c2020-09-21_with_unc.nc | less (then you can look inside the netCDF file) $ ipython3 import netCDF4 import numpy as np import matplotlib.pyplot as plt fn="hybrid_reference_spectrum_p005nm_resolution_c2020-09-21_with_unc.nc" nc = netCDF4.Dataset(fn, 'r', format="NETCDF4") # check structure and contents of the data nc.dimensions nc.variables nc.variables.keys() nc['SSI'] nc['Vacuum Wavelength'] nc['Wavelength_Band_Width'] nc['SSI_UNC'] type(nc['SSI'][:]) # draw a graph x=np.array((nc['SSI'][:], nc['Vacuum Wavelength'][:])) plt.xlabel("wavelength / nm") plt.ylabel("spectral irradiance / (W m-2 nm-1)") plt.xlim([300,700]) plt.plot(x[1], x[0], lw=0.02, color="black") plt.show()

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