Pilot Test ZoneMeasurements using radiosonde are performed mainly at
- 00 and 12 UTCCorrect answer
- 09 and 18 UTC
- 03 and 15 UTC
- Every hour
Explanation
Upper-air observations using radiosondes are coordinated globally by the World Meteorological Organization (WMO) to occur simultaneously, primarily at 00:00…
🔒 The full EASA/ICAO explanation is available in the app.
