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ecmwf-lab / ai-models-graphcast

Apache License 2.0
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1 hour predictions with graphcast #11

Closed iluise closed 7 months ago

iluise commented 7 months ago

I would like to modify the module to get hourly predictions from graphcast:

So, what I have done was to change just the steps and the lagger to 1 here: https://github.com/ecmwf-lab/ai-models-graphcast/blob/main/ai_models_graphcast/model.py#L87-L88

But I am not sure about how to change the lines here: https://github.com/ecmwf-lab/ai-models-graphcast/blob/main/ai_models_graphcast/model.py#L277-L284

Is it correct to use the scda stream for all the values with % 12 != 0 ? Because at the moment I get the plot I post below. Thanks in advance.

Screenshot 2024-03-04 at 17 43 32
mchantry commented 7 months ago

Hello. It is not possible to get 1hour predictions from GraphCast. The model steps forward in 6h increments. I do not see any way, without retraining, to get a 1-hour prediction.

iluise commented 7 months ago

Yeah, small misunderstanding within the team :) Sorry for the noise. Best,

Ilaria