HorizontalVisibility

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility

An aggregation of horizontal visibility conditions typically reported together at an aerodrome, including the prevailing visibility and minimum visibility.

Source: ICAO IWXXM
Parent concept: Object


Properties:

Properties Definition Type
minimumVisibilityDirection The direction of the minimum visibility relative to the reporting station. CodeCompassPointType
prevailingVisibility The greatest visibility value, observed in accordance with the definition of visibility", which is reached within at least half the horizon circle or within at least half of the surface of the aerodrome. These areas could comprise contiguous or non-contiguous sectors." ValDistanceType
minimumVisibility Visibility for aeronautical purposes is the greater of: a) the greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background; b) the greatest distance at which lights in the vicinity of 1 000 candelas can be seen and identified against an unlit background. ValDistanceType
isUnidirectionalVisibility Indication whether the horizontalVisibility is given for a single direction or not.

Boolean

isPrevailingVisibilityAbove10000metres Indication that the prevailing visibility is of at least 10000 meters.

Boolean

minimumVisibilityDirection

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility@minimumVisibilityDirection

The direction of the minimum visibility relative to the reporting station.

type: CodeCompassPointType

Model Concept

ICAO WXXM 3.0.0

minimumVisibilityDirection

prevailingVisibility

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility@prevailingVisibility

The greatest visibility value, observed in accordance with the definition of visibility", which is reached within at least half the horizon circle or within at least half of the surface of the aerodrome. These areas could comprise contiguous or non-contiguous sectors."

type: ValDistanceType

Model Concept

ICAO WXXM 3.0.0

prevailingVisibility

AIXM 5.1.1

visibility

ICAO WXXM 3.0.0

prevailingVisibility

ICAO WXXM 3.0.0

prevailingVisibility

minimumVisibility

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility@minimumVisibility

Visibility for aeronautical purposes is the greater of: a) the greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background; b) the greatest distance at which lights in the vicinity of 1 000 candelas can be seen and identified against an unlit background.

type: ValDistanceType

Model Concept

ICAO WXXM 3.0.0

minimumVisibility

isUnidirectionalVisibility

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility@isUnidirectionalVisibility

Indication whether the horizontalVisibility is given for a single direction or not.

type: Boolean

isPrevailingVisibilityAbove10000metres

urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:HorizontalVisibility@isPrevailingVisibilityAbove10000metres

Indication that the prevailing visibility is of at least 10000 meters.

type: Boolean