Info on windows (transmittance, U-factor, etc.)
    https://www.commercialwindows.org/vt.php
    
 Solar radiation values definition/relations
    https://www.ammonit.com/en/wind-solar-wissen/solarmessung

Computing DNI/DHI from GHI and solar position: 
    https://plantpredict.com/algorithm/irradiance-radiation/
    
    
Gaussian Process Kernel Cookbook:
	https://www.cs.toronto.edu/~duvenaud/cookbook/
	
GPflow Manipulating Kernels:
	https://gpflow.readthedocs.io/en/develop/notebooks/advanced/kernels.html
	
Neural Network Gaussian Process:
	https://en.wikipedia.org/wiki/Neural_network_Gaussian_process
	
Sparse Gaussian Process Tutorial (github):
	http://krasserm.github.io/2018/03/19/gaussian-processes/
	http://krasserm.github.io/2020/12/12/gaussian-processes-sparse/
	
Sparse Gaussian Processes (youtube):
	https://www.youtube.com/watch?v=sQmsQq_Jfi8
	
Deep Gaussian Processes (youtube):
	https://www.youtube.com/watch?v=750fRY9-uq8