SIGMETEvolvingCondition
SIGMETEvolvingCondition
Conditions that indicate the presence of a specific SIGMET phenomenon such as volcanic ash or a thunderstorm, along with expected changes to the phenomenon such as intensity, speed, and direction. These conditions are reported with OBS/FCST conditions on all SIGMET types. TC TOP (ABV and BLW) conditions are represented by the vertical component of the geometry. For example: CB TOP FL500 is represented as a missing lowerLimit and an upperLimit of 500FL. In cases where the position covers an entire FIR or CTA, (ENTIRE CTA or ENTIRE FIR" from ICAO Annex 3 / WMO No. 49-2), the geometry should be an xlink to the AirspaceVolume under geometryComponent of issuingAirTrafficServicesRegion."
| Properties | Definition | Type |
|---|---|---|
| approximateLocation | Indicator of whether the location of phenomena is approximate. If not reported locations are not approximate | Boolean |
| directionOfMotion | This element refers to the expected direction of movement which the phenomenon is moving towards, .e.g, moving east". When no movement is expected, this is a http://www.opengis.net/def/nil/OGC/0/inapplicable nilReason and the speedOfMotion will be 0. This element value is given in degrees from true North. Plane angle unit of measure (uom) is "deg". " | AngleWithNilReason |
| geometry | The expected geographic region(s) affected by the reported phenomenon at a particular time (thunderstorms, volcanic ash, etc.). This geometry covers all combinations of phenomenon historically reported in ICAO Annex 3 / WMO No. 49-2: a boundary with a base and top, a TC centre position, and a VA line with a width | AirspaceVolume |
| intensityChange | The expected change in intensity for the reported meteorological condition (e.g., intensifying, weakening, or no change) determined at the time of SIGMET analysis based on the current state of the meteorological condition | ExpectedIntensityChange |
| speedOfMotion | The expected speed of movement of a meteorological condition. When no movement is expected, this will have a value of 0 and directionOfMotion will have a http://www.opengis.net/def/nil/OGC/0/inapplicable nilReason. speedOfMotion can be provided in either two units of measures: km/h" or "[kn_i]" (knots). " | Velocity |
Details
SIGMETEvolvingCondition
SIGMETEvolvingCondition
Conditions that indicate the presence of a specific SIGMET phenomenon such as volcanic ash or a thunderstorm, along with expected changes to the phenomenon such as intensity, speed, and direction. These conditions are reported with OBS/FCST conditions on all SIGMET types. TC TOP (ABV and BLW) conditions are represented by the vertical component of the geometry. For example: CB TOP FL500 is represented as a missing lowerLimit and an upperLimit of 500FL. In cases where the position covers an entire FIR or CTA, (ENTIRE CTA or ENTIRE FIR" from ICAO Annex 3 / WMO No. 49-2), the geometry should be an xlink to the AirspaceVolume under geometryComponent of issuingAirTrafficServicesRegion."
Notes
Container
approximateLocation
SIGMETEvolvingCondition.approximateLocation
Indicator of whether the location of phenomena is approximate. If not reported locations are not approximate
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Change request | A change request is required on the AIRM. |
directionOfMotion
SIGMETEvolvingCondition.directionOfMotion
This element refers to the expected direction of movement which the phenomenon is moving towards, .e.g, moving east". When no movement is expected, this is a http://www.opengis.net/def/nil/OGC/0/inapplicable nilReason and the speedOfMotion will be 0. This element value is given in degrees from true North. Plane angle unit of measure (uom) is "deg". "
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| WeatherPhenomenon.movement | The movement of the weather phenomenon. |
geometry
SIGMETEvolvingCondition.geometry
The expected geographic region(s) affected by the reported phenomenon at a particular time (thunderstorms, volcanic ash, etc.). This geometry covers all combinations of phenomenon historically reported in ICAO Annex 3 / WMO No. 49-2: a boundary with a base and top, a TC centre position, and a VA line with a width
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| WeatherCondition.contour | A contour used to outline a particular weather situation within the forecast or observation. |
Notes
contour in preference to AirspaceVolume
intensityChange
SIGMETEvolvingCondition.intensityChange
The expected change in intensity for the reported meteorological condition (e.g., intensifying, weakening, or no change) determined at the time of SIGMET analysis based on the current state of the meteorological condition
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Change request | A change request is required on the AIRM. |
speedOfMotion
SIGMETEvolvingCondition.speedOfMotion
The expected speed of movement of a meteorological condition. When no movement is expected, this will have a value of 0 and directionOfMotion will have a http://www.opengis.net/def/nil/OGC/0/inapplicable nilReason. speedOfMotion can be provided in either two units of measures: km/h" or "[kn_i]" (knots). "
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| MovementDescription.speed | Speed of the movement of the meteorological phenomenon. |