The temporal aggregation is presented in two different formats: 6-hourly intervals and daily intervals. In addition, an aggregation based on a 5-day moving average (Alert) is also available.
4.1.6-hourly Anchor Section4.1 Section4.1
The 6-hourly intervals are centred on the main synoptic hours (00, 06, 12 and 18 UTC) as described in Table 8.
...