Extracted period

For PV-series and load series, the prediction horizon will partitioned into a number of classes or bins, each with the width of the “Extracted period”. In the example above, the percentiles will reflect the uncertainty of the forecasts -2-4, 5-10, 11-16 etc. hours ahead. So if it is important to distinguish each hour from another, the extracted period should be 1 hour. At the same time, if you use prog-files, the forecast export frequency should also have been hourly; otherwise, there is not enough data to estimate e.g. the uncertainty for weekends at noon 8 hours ahead.