Hello everyone, I hope you are in good health.
The following plot presents the global horizontal solar radiation from the TMY file for a specific location compared to the actual measured global horizontal solar radiation for the same station. I expected that the averaged irradiance trajectory from the TMY file will correspond to the measured data of the same year. But even the peak is significantly shifted.
What is the best way to approximately predict the hourly averaged global horizontal solar radiation trajectory for a future day ?
