ground visibility


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ground visibility

[′grau̇nd ‚viz·ə′bil· əd·ē]
(meteorology)
In aviation terminology, the horizontal visibility observed at the ground, that is, surface visibility or control-tower visibility.

ground visibility

The visibility at an aerodrome, as reported by an accredited observer (ICAO). The visibility is contained in a weather observation reported by an ATC (air traffic control) unit, an FSS (flight service station), a community aerodrome radio station, an automated weather observation system, or a radio station that is ground-based and operated by an air operator. It is the prevailing horizontal visibility near the earth's surface as reported by an accredited observer or given by the RVR (runway visual range).
References in periodicals archive ?
Another requirement is that the reported ground visibility at the destination airport must be at least one statute mile.
The ground visibility as determined by a certified weather observer.
"Controlling visibility is not ground visibility, as reflected by the RVR values, but rather flight visibility as measured from the cockpit of the aircraft." In this case, the pilot has the runway in sight.
If taking off or landing at an airport, any officially reported ground visibility at the airport (such as a METAR) must also be at least one mile.
What bothered me was how we'd stay legal to land in the control zone, at which time we'd need at least a 1000-foot ceiling and three miles of ground visibility or, an ATC clearance for special VFR.