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In case of solar and PV time series we use satellite data since history up to present moment plus 4-5 hours ahead. This include historical (archived) data, operational data, real-time and nowcasting data. Historical data spans up to last completed calendar month and can be considered as "definitive". Data in current calendar month up to DAY-1 is "operational" and will be re-analysed in the next month using final data inputs. Important to note is that differences introduced with every update is typically small. Data in current day are from "real-time" satellite model and will be updated when day finishes. Then, based on last satellite scenes we predict cloud motion in period in next 4-5 hours ("nowcasting"). The present moment and short period before is covered by "nowcasting" data as the last satellite scene is still in progress. This delay can take up to 30 minutes (depends on satellite scan frequency). After nowcasting period we use post-processed outputs from Numerical Weather Prediction models (NWP). Satellite based data is seamlessly integrated with NWP forecasting data within one response.

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