Excarta WIP processing and analysis

[zakwatts]

Excarta data processing and analysis scripts.

The Excarta data that has been provided is not as expected. Instead of a grid of irradiance they have sent a x2 diagonal lines across the specified lat long range.

There also appears to be sharp cut offs in the DNI variable (downwards normal irradiance) around midday which persists throughout the dataset.

These results have been documented in google drive.

There is still the potential to use this data to create an nwp source using a single point which could be tested on the 'island' use case. (this could be provided as an NWP source, or a single point feature)

Further analysis could also be done looking at the how the data for the island case, mentioned above, compares to PV and NWP variables for specific days to see if this dataset can capture features that the NWPs can't.

The notebook is WIP and I have just pushed it to save work as I go.

Checklist:

• [ ] My code follows OCF's coding style guidelines
• [ ] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have checked my code and corrected any misspellings

[peterdudfield]

Nice, good to push code as you go