AIRMET


             AIRMET

An AIRMET (significant meteorological) report. AIRMETs report the occurrence and/or expected occurrence of specified en-route weather phenomena which may affect the safety of aircraft operations, and of the development of those phenomena over time. The AIRMET report class represents the base AIRMET types that may be reported such as squall lines, thunderstorms, dust storms, turbulence, etc. AIRMETs may report either observed or forecast hazardous conditions.

Properties	Definition	Type
analysis	AIRMETs may include the same phenomenon covering more than one area within the FIR/UIR/CTA, as well as observed and forecast conditions for each of these reported areas. AIRMETs may include a single set of observed and/or forecast conditions at a particular time, which is represented as a single analysis with a single AIRMETEvolvingConditionCollection as its result.	AIRMETEvolvingConditionCollection
cancelledReportSequenceNumber	The sequence number of a previous AIRMET that is cancelled by this AIRMET. Mandatory when this is a cancellation report, must be missing otherwise Examples: YUDD AIRMET 2 VALID ... YUDD AIRMET A3 VALID ...	CharacterString
cancelledReportValidPeriod	The valid period of a previous AIRMET that is cancelled by this AIRMET. Mandatory when this is a cancellation report, must be missing otherwise	TM_Period
isCancelReport	Indicates whether the report is a 'CANCELLATION' report (true) which cancels a previously issued report or not (false or empty).	Boolean
issueTime	The time at which this report was issued	TM_Instant
issuingAirTrafficServicesRegion	The ATS region (FIR, UIR, CTA, or FIR/UIR)	Airspace
issuingAirTrafficServicesUnit	The ATS unit serving the FIR or CTA to which the AIRMET refers. ICAO Annex 3 / WMO No. 49-2: A6-1: Location indicator of FIR/CTA""	Unit
originatingMeteorologicalWatchOffice	MWO originating this report	Unit
phenomenon	The reported phenomenon, such as thunderstorm, tropical cyclone, icing, mountain wave, etc.	AeronauticalAreaWeatherPhenomenon
sequenceNumber	The sequence number of this message. For example: 5", "A3", or "2""	StringWithNilReason
validPeriod	The valid period for the entire report, including all observations and forecast conditions. Each observation/forecast phenomenon includes its own period of validity for described meteorological conditions, which is represented as the O&M Observation validTime.	TM_Period

Details

AIRMET


              AIRMET

Semantic Correspondence

AIRM Concept	Definition
AIRMET	Information issued by a meteorological watch office concerning the occurrence or expected occurrence of specified en-route weather phenomena which may affect the safety of low-level aircraft operations and which was not already included in the forecast issued for low-level flights in the flight information region concerned or sub-area thereof.

Notes

In Logical Model: urn:aero:airm:1.0.0:LogicalModel:Subjects:Meteorology:WeatherCondition

analysis


              AIRMET.analysis

AIRMETs may include the same phenomenon covering more than one area within the FIR/UIR/CTA, as well as observed and forecast conditions for each of these reported areas. AIRMETs may include a single set of observed and/or forecast conditions at a particular time, which is represented as a single analysis with a single AIRMETEvolvingConditionCollection as its result.

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

Notes

processing

cancelledReportSequenceNumber


              AIRMET.cancelledReportSequenceNumber

The sequence number of a previous AIRMET that is cancelled by this AIRMET. Mandatory when this is a cancellation report, must be missing otherwise Examples: YUDD AIRMET 2 VALID ... YUDD AIRMET A3 VALID ...

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

cancelledReportValidPeriod


              AIRMET.cancelledReportValidPeriod

The valid period of a previous AIRMET that is cancelled by this AIRMET. Mandatory when this is a cancellation report, must be missing otherwise

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

isCancelReport


              AIRMET.isCancelReport

Indicates whether the report is a 'CANCELLATION' report (true) which cancels a previously issued report or not (false or empty).

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

Notes

report

issueTime


              AIRMET.issueTime

The time at which this report was issued

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

issuingAirTrafficServicesRegion


              AIRMET.issuingAirTrafficServicesRegion

The ATS region (FIR, UIR, CTA, or FIR/UIR)

Semantic Correspondence

AIRM Concept	Definition
Change request	A change request is required on the AIRM.

issuingAirTrafficServicesUnit


              AIRMET.issuingAirTrafficServicesUnit

The ATS unit serving the FIR or CTA to which the AIRMET refers. ICAO Annex 3 / WMO No. 49-2: A6-1: Location indicator of FIR/CTA""

Semantic Correspondence

AIRM Concept	Definition
Unit	A generic term referring to all types of entities providing all types of ATM related services.

originatingMeteorologicalWatchOffice


              AIRMET.originatingMeteorologicalWatchOffice

MWO originating this report

Semantic Correspondence

AIRM Concept	Definition
WeatherCondition.weatherInformationSource	The weather information source.

Notes

Mapping could be further constrained if we add MWO to the list of possibilities.

phenomenon


              AIRMET.phenomenon

The reported phenomenon, such as thunderstorm, tropical cyclone, icing, mountain wave, etc.

Semantic Correspondence

AIRM Concept	Definition
WeatherCondition.phenomenon	The phenomenon of relevance for the weather condition.

Notes

IWXXM: Recommendation: don’t use etc.

sequenceNumber


              AIRMET.sequenceNumber

The sequence number of this message. For example: 5", "A3", or "2""

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.

validPeriod


              AIRMET.validPeriod

The valid period for the entire report, including all observations and forecast conditions. Each observation/forecast phenomenon includes its own period of validity for described meteorological conditions, which is represented as the O&M Observation validTime.

Semantic Correspondence

AIRM Concept	Definition
Out of scope	This concept is considered as out of the scope of the AIRM.