MeteorologicalAerodromeTrendForecast
MeteorologicalAerodromeTrendForecast
Meteorological conditions for trend forecasting at an aerodrome. This class is also related but not identical to MeteorologicalAerodromeForecast which is reported on a TAF - conditions reported in trend forecasts in METAR/SPECI differ from forecast groups in a TAF. When no clouds of operational significance or no weather of operational significance is predicted, the NothingOfOperationalSignificance nilReason should be used for the cloud or presentWeather association. When no clouds were detected by the automatic observing system, the NotDetectedByAutoSystem nilReason should be used for the cloud association.
| Properties | Definition | Type |
|---|---|---|
| changeIndicator | The change indicator for this trend forecast - becoming, temporary conditions, or no significant change | ForecastChangeIndicator |
| cloud | Forecast of cloud. | AerodromeCloudForecast |
| cloudAndVisibilityOK | When true, indicates that the following conditions occur simultaneously at the time of forecast (also know as CAVOK"): a) visibility, 10km or more, and the lowest visibility is not reported b) no cloud of operational significance c) no weather of significance to aviation Information on visibility, runway visual range, present weather and cloud amount, cloud type and height of cloud base shall not be reported. See ICAO Annex 3 / WMO No. 49-2 Section 2.2." | Boolean |
| phenomenonTime | The time at which meteorological phenomena occur | TM_Object |
| prevailingVisibility | The prevailing horizontal visibility reported in a trend forecast. Prevailing horizontal visibility shall be reported in meters (m")." | Distance |
| prevailingVisibilityOperator | The reported relational operator for the prevailing horizontal visibility. When reported, this operator is reported in conjunction with prevailing visibility. To report a prevailing visibility of at least 10000 meters, prevailing visibility is reported as 10000 meters and the operator is reported as above". When no operator is reported, prevailing visibility represents an exact value with identical semantics to other measured quantities" | RelationalOperator |
| surfaceWind | Forecast of surface wind. | AerodromeSurfaceWindTrendForecast |
| timeIndicator | The human-readable time indicator for this trend forecast. This should match the time period or time instant reported in the phenomenon time | TrendForecastTimeIndicator |
| weather | Forecast of weather phenomena. | AerodromeForecastWeather |
Details
MeteorologicalAerodromeTrendForecast
MeteorologicalAerodromeTrendForecast
Meteorological conditions for trend forecasting at an aerodrome. This class is also related but not identical to MeteorologicalAerodromeForecast which is reported on a TAF - conditions reported in trend forecasts in METAR/SPECI differ from forecast groups in a TAF. When no clouds of operational significance or no weather of operational significance is predicted, the NothingOfOperationalSignificance nilReason should be used for the cloud or presentWeather association. When no clouds were detected by the automatic observing system, the NotDetectedByAutoSystem nilReason should be used for the cloud association.
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| TREND | A concise statement of the expected significant changes in the meteorological conditions at that aerodrome to be appended to a local routine or local special report, or a METAR or SPECI. |
changeIndicator
MeteorologicalAerodromeTrendForecast.changeIndicator
The change indicator for this trend forecast - becoming, temporary conditions, or no significant change
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| WeatherCondition.changeIndicator | Indication about the type of meteorological conditions changes. |
cloud
MeteorologicalAerodromeTrendForecast.cloud
Forecast of cloud.
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Out of scope | This concept is considered as out of the scope of the AIRM. |
Notes
role played by AerodromeCloudForecast in this specific application context;
cloudAndVisibilityOK
MeteorologicalAerodromeTrendForecast.cloudAndVisibilityOK
When true, indicates that the following conditions occur simultaneously at the time of forecast (also know as CAVOK"): a) visibility, 10km or more, and the lowest visibility is not reported b) no cloud of operational significance c) no weather of significance to aviation Information on visibility, runway visual range, present weather and cloud amount, cloud type and height of cloud base shall not be reported. See ICAO Annex 3 / WMO No. 49-2 Section 2.2."
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| AerodromeCondition.cavok | Visibility, cloud and present weather better than prescribed values or conditions. |
phenomenonTime
MeteorologicalAerodromeTrendForecast.phenomenonTime
The time at which meteorological phenomena occur
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Out of scope | This concept is considered as out of the scope of the AIRM. |
prevailingVisibility
MeteorologicalAerodromeTrendForecast.prevailingVisibility
The prevailing horizontal visibility reported in a trend forecast. Prevailing horizontal visibility shall be reported in meters (m")."
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| 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." |
prevailingVisibilityOperator
MeteorologicalAerodromeTrendForecast.prevailingVisibilityOperator
The reported relational operator for the prevailing horizontal visibility. When reported, this operator is reported in conjunction with prevailing visibility. To report a prevailing visibility of at least 10000 meters, prevailing visibility is reported as 10000 meters and the operator is reported as above". When no operator is reported, prevailing visibility represents an exact value with identical semantics to other measured quantities"
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Change request | A change request is required on the AIRM. |
Notes
see notes onmax and min modelling
surfaceWind
MeteorologicalAerodromeTrendForecast.surfaceWind
Forecast of surface wind.
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Out of scope | This concept is considered as out of the scope of the AIRM. |
Notes
role played by AerodromeSurfaceWindTrendForecast in this specific application context;
timeIndicator
MeteorologicalAerodromeTrendForecast.timeIndicator
The human-readable time indicator for this trend forecast. This should match the time period or time instant reported in the phenomenon time
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Out of scope | This concept is considered as out of the scope of the AIRM. |
weather
MeteorologicalAerodromeTrendForecast.weather
Forecast of weather phenomena.
Semantic Correspondence
| AIRM Concept | Definition |
|---|---|
| Out of scope | This concept is considered as out of the scope of the AIRM. |
Notes
role played by AerodromeForecastWeather in this specific application context;