: Public <<FeatureType>> Class
Created: 02/05/2012 9:53:08 AM
Modified: 08/05/2013 3:16:39 PM
Project:
Advanced:
A SIGMET (significant meteorological) report. SIGMETs 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. <br /></p><p><br /></p><p>The SIGMET report class represents the base SIGMET types that may be reported such as squall lines, thunderstorms, dust storms, turbulence, etc. Tropical cyclone and volcanic ash SIGMET reports are subclasses of SIGMET due to their ability to report additional information, including volcano/tropical cyclone identification and forecast position(s).<br /></p><p><br /></p><p>SIGMETs may report either observed or forecast hazardous conditions. Additionally, a forecast position may be reported.<br /></p>
Attribute
Public SIGMETEvolvingConditionAnalysis
  analysis

Details:
sequenceNumber=9
Notes: SIGMETs 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.  All combinations of observations and forecasts of meteorological conditions, including changing conditions, are represented by their own SIGMETEvolvingMeteorologicalCondition.<br /></p><p><br /></p><p>Each analysis has a single EvolvingMeteorologicalCondition as its result.  <br /></p>
Public CharacterString
  cancelledSequenceNumber

Details:
sequenceNumber=6
Notes: The cancelled SIGMET sequence number.  Mandatory when this is a cancellation report, must be missing otherwise<br /></p><p><br /></p><p>Examples:<br /></p><p>YUDD SIGMET 2 VALID ...<br /></p><p>YUDD SIGMET A3 VALID ...<br /></p>
Public TM_Period
  cancelledValidPeriod

Details:
sequenceNumber=7
Notes: The valid period of a previous SIGMET that is cancelled by this SIGMET.  Mandatory when this is a cancellation report, must be missing otherwise
Public SIGMETPositionAnalysis
  forecastPositionAnalysis

Details:
sequenceNumber=10
Notes: One or more forecast positions at the end of the valid period - one for each phenomenon area within an FIR.  These are modeled as a single OM_Observation sub-type with a feature collection result due to the shared time and other observation metadata for all forecast positions.
Public Unit
  issuingAirTrafficServicesUnit

Details:
sequenceNumber=2
Notes: The ATS unit serving the FIR or CTA to which the SIGMET refers<br /></p><p><br /></p><p>ICAO Annex 3 / WMO No. 49-2:<br /></p><p>A6-1: "Location indicator of FIR/CTA"<br /></p>
Public Unit
  originatingMeteorologicalWatchOffice

Details:
sequenceNumber=3
Notes: MWO originating this report
Public AeronauticalSignificantWeatherPhenomenon
  phenomenon

Details:
sequenceNumber=8
Notes: The reported phenomenon, such as thunderstorm, tropical cyclone, icing, mountain wave, etc.<br /></p><p><br /></p><p>The expected end of occurrence of volcanic ash ("NO VA EXP") shall be indicated with a missing SIGMET phenomenon with a nil reason of nothingOfOperationalSignificance<br /></p>
Public CharacterString
  sequenceNumber

Details:
sequenceNumber=4
Notes: The sequence number of this message.  For example: "5", "A3", or "2"
Public SIGMETReportStatus
  status

Details:
sequenceNumber=1
xsdAsAttribute=true
Notes: The SIGMET report status - cancelled or normal
Public TM_Period
  validPeriod

Details:
sequenceNumber=5
Notes: 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.<br /></p><p><br /></p><p>For example, an issued tropical cyclone SIGMET may be valid from 1600 UTC to 2200 UTC with an observed position at 1600 UTC and a forecast position of the centre of the tropical cyclone at 2200 UTC.  In this case the SIGMET validPeriod would be 1600 UTC to 2200 UTC, the analysis validTime would be 1600 UTC, and the forecastPositionAnalysis validTime would be 2200 UTC.<br /></p>
Tag Value
byValuePropertyType false
Details:
Values: false
Default: false
Description: Create a property type that requires that the instance is encoded inline (applies to ISO 19136:2007 encoding rule). Always set to false in INSPIRE.
isCollection false
Details:
Values: true | false
Default: false
Description: Identifies the feature type as a feature collection.
noPropertyType false
Details:
Values: false
Default: false
Description: Surpress creation of a standard property type that supports inline or by-reference encoding (applies to ISO 19136:2007 encoding rule). Always set to false in INSPIRE.
xsdEncodingRule iso19136_2007
Details:
Values: iso19136_2007 | iso19139_2007 | iso19136_2007_INSPIRE_Extensions
Default: iso19136_2007
Description: XML Schema encoding rule to apply
Constraint Type Status
self.classification.result.oclIsKindOf( EvolvingMeteorologicalCondition ) Invariant Approved
Details:
OBS and FCST classifications must have a result type of EvolvingMeteorologicalCondition
if( status == CANCELLATION ) analysis.result includes nilReason Invariant Approved
Details:
A canceled SIGMET only include identifying information (time and airspace) and no other information
if( status == NORMAL ) analysis.result excludes nilReason AND analysis.size() > 0 Invariant Approved
Details:
There must be at least one analysis when a SIGMET does not have canceled status
self.forecastPositionAnalysis.result.member.oclIsKindOf( MeteorologicalPosition ) Invariant Approved
Details:
 
Object Type Connection Notes
«FeatureType» TropicalCycloneSIGMET Class Generalization  
«FeatureType» VolcanicAshSIGMET Class Generalization