may I ask for your sun.zarr?
@peterdudfield
Hello!
I am currently a Master's student with a keen interest in your study. In your paper, you mention that the solar coordinates are [16, 2], where I understand '2' to refer to Azimuth and Elevation. However, I couldn't determine what the '16' represents by examining your code. If it indicates a time range, could you please specify the time period it covers?
I noticed the reference "gs://solar-pv-nowcasting-data/Sun/v1/sun.zarr/" in your ocf_datapipes repository but couldn't find further information (from what time to what time) regarding the number '16' mentioned in the paper. Could you please clarify this?
Additionally, if you don't have the file available, that's fine. I would be grateful just to understand what the '16' represents (e.g., the specific time range) as I am working on calculations using PVLib.
Thank you for your assistance!
Hello, I think I may be able to help with this one, glad to see you're interested in the workshop paper OCF produced.
So for the [16,2] shape of the solar coordinates mentioned in the paper you are correct the 2 is the number of variables, the azimuth and elevation, the 16 is the number of steps, the steps are half hourly so in total we have 8 hours worth of solar coordinates which relates to the forecast we produce being up to 8 hours ahead and forecasting at 30 minutes granularity.
I believe the sun zarr referenced is part of a pipeline that is actually deprecated/not used anymore, we should remove that for clarity, thanks for bringing it to our attention. We use pvlib to calculate the solar coordinates as part of our pipeline in ocf_datapipes, you can see the function which does that here.
I hope that is useful, let us know if you have further questions, thanks.
That helps a lot! thank you for your clarification!!