METAR observations taken at 0000, 0600, 1200, and 1800 UTC include additional data and are known as what?

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Multiple Choice

METAR observations taken at 0000, 0600, 1200, and 1800 UTC include additional data and are known as what?

Explanation:
These reports follow a fixed cadence of every six hours, four times per day, at 0000, 0600, 1200, and 1800 UTC. When METAR observations are taken on this six-hourly schedule and include the extra data fields associated with that cadence, they’re referred to as six-hourly observations. This routine—as opposed to irregular SPECI reports triggered by weather changes, or alternative schedules like three-hourly or purely local routine reports—provides a consistent global baseline of aviation weather data.

These reports follow a fixed cadence of every six hours, four times per day, at 0000, 0600, 1200, and 1800 UTC. When METAR observations are taken on this six-hourly schedule and include the extra data fields associated with that cadence, they’re referred to as six-hourly observations. This routine—as opposed to irregular SPECI reports triggered by weather changes, or alternative schedules like three-hourly or purely local routine reports—provides a consistent global baseline of aviation weather data.

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