Definition
Worldwide weather data collected continuously from a network of sources -- including surface stations, weather balloons, ships, aircraft, radar, and satellites -- and shared internationally to support aviation forecasting, flight planning, and air traffic management on a global scale.
Plain English
Weather information gathered from all over the world, all the time, from many different tools and stations, then shared so pilots and forecasters everywhere can use it.
Context Anchor
Seen in NextGen discussions about how aviation weather information is gathered, shared, and used across the air transportation system.
Derivation
Global comes from globe, meaning the whole Earth. Observation comes from a Latin root meaning to watch or notice. In aviation weather, an observation is a measured or reported condition, not a guess about what might happen later.
Why Pilots Care
Supports safer routing decisions on long-haul and cross-border flights by delivering consistent weather data regardless of region.
Grounding Statement
For a long flight, global weather observations help turn many separate weather reports into one broad picture of what the atmosphere is doing along the route.
Intuition Check
Do not read observations as forecasts. Observations are reports of weather that has been measured or seen; forecasts are predictions of what the weather is expected to do.
Example Sentence 1
Modern flight planning systems rely on global weather observations to build accurate forecasts for long international routes.
Example Sentence 2
NextGen integrates global weather observations to keep the cockpit display current over remote areas.