10 0 Reserved 21 1 Past day 32 2 Present day 43 3 Mean from 24 Measurements from day before past day 23:50 UTC until past day 22:50 UTC 54 4 Mean from 3 Measurements at 06:50, 13:50 and 20:50 UTC from past day 65 5 From past day 06:30 UTC until 06:30 UTC (today) 76 6 From past day 21 UTC until 21 UTC (today) 87 7 Last 10 hours 915 15 Missing value 10