NOTE: This is a Proof of Concept Only
Service Name: Aerodrome Weather 
Service Identifier: http://airservicesaustralia.aero/service/M001
Lifecycle Information
| Service Version | Service Date | Service Status |
|---|---|---|
 MVP.01 |
 Available: 2019-10-01 |
 Experimental |
Service Description 
The Aerodrome Weather data service includes routine observations made at an aerodrome throughout the day, special (i.e., non-routine) observation made at an aerodrome as needed, and forecast of meteorological conditions at an aerodrome, and modifications to those conditions throughout a specified period.
The Aerodrome Weather data service is based on three meterological reports:
- Aerodrome Weather Report (METAR),
- Special Aerodrome Weather Report (SPECI), and
- Aerodrome Forecast (TAF).
These reporting constructs are as defined in ICAO Annex 3, with extensions defined by the Australian Bureau of Meteorology.
A METAR is a routine weather report issued at hourly or half-hourly intervals. It is a description of the meteorological conditions observed at an airport at a specific time.
A SPECI is special weather report issued when there is significant deterioration or improvement in airport weather conditions, such as significant changes of surface winds, visibility, cloud base height and occurrence of severe weather.
A TAF is a forecast of weather conditions at an airport, routinely issued four times a day for major civil aerodromes covering a 24- or 30-hour period, within a radius of 5NM of the airport reference point.
Service Categories 
Meteorological Observation urn:aero:airm:1.0.0:ConceptualModel:Subjects:Meteorology:MeteorologicalObservation
Meteorological Forecast urn:aero:airm:1.0.0:ConceptualModel:Subjects:Meteorology:MeteorologicalForecast
Aerodrome urn:aero:airm:1.0.0:ConceptualModel:Subjects:BaseInfrastructure:AerodromeInfrastructure:Aerodrome
METAR urn:aero:airm:1.0.0:ConceptualModel:Subjects:AirTrafficOperations:InformationServicesProducts:MeteorologicalInformationProduct:METAR
TAF urn:aero:airm:1.0.0:ConceptualModel:Subjects:AirTrafficOperations:InformationServicesProducts:MeteorologicalInformationProduct:TAF
Service Functions 
The Aerodrome Weather data service supports the following business functions:
- Monitor weather situation
- Manage airport performance
- Manage external constraints
- Balance airport demand with resources and capabilities planning
The Aerodrome Weather data service supports the following operational requirements:
Geographical Extent of Information 
The Aerodrome Weather data service covers all aerodromes within the Australian Flight Information Region that have a METAR or a TAF service.
Source of Information 
The original meteorological information is sourced from the Australian Bureau of Meteorology.
Quality of Service 
Availability: 99.9%
Capacity: 1,000 messagse per minute
Service Verification 
The Service has been reviewed by the Australian Aeronautical Data Services Reference Group (which does not exist!).
Access Restrictions 
The Data Service is accessible to approved consumers and contains non-sensitive information. (Note: this is an example only)
Data Exchange Model 
The data exchange models for the Aerodrome Weather data service are shown below. Figure 1 shows the data entities for the Aerodrome Weather observations (METAR and SPECI) and Figure 2 shows the Aerodrome Weather predictions (TAF).
Figure 1 - METAR and SPECI Data Model
Figure 2 - TAF Data Model
The full list of data entities and their properties are included in the below table and their mapping to the Aeronautical Information Reference Model (AIRM).
| Data Service Entity | Property | AIRM Mapping |
|---|---|---|
| MeterologicalAerodromeObservationReport | urn:aero:airm:Concept:ObservationReport | |
| MeterologicalAerodromeObservationReport | issueTime | urn:aero:airm:Logical:timeofIssue |
| MeterologicalAerodromeObservationReport | aerodrome | urn:aero:airm:Logical:ICAOaerodrome |
| MeterologicalAerodromeObservation | urn:aero:airm:Concept:Observation | |
| MeterologicalAerodromeObservation | airTemperature | urn:aero:airm:Logical:airTemp |
| MeterologicalAerodromeObservation | cloudAndVisibility | urn:aero:airm:Logical:cloudVisibility |
| etc… | etc… | etc… |
Message Exchange Pattern 
The Aerodrome Weather data service supports the Publish/Subscribe message exchange pattern, including:
- A subscription interface: Containing operations that relate to the management of the service subscription (e.g. subscribe, unsubscribe, pause, resume)
- A publish interface: Dealing with the actual publication of data to consumers
The Publish/Subscribe message exchange pattern is implemented with the Advanced Message Queuing Protocol (AMQP) Version 1.0.
Service Interface 
The message exchange pattern for the service supports the following interfaces:
| Operation | Resouce Endpoint | Method |
|---|---|---|
| subscribe | etc | etc |
| unsubscribe | etc | etc |
| pause | etc | etc |
| resume | etc | etc |
| publish | etc | etc |
Service Filtering 
The Aerodrome Weather data service supports the following filtering options:
Aerodrome - specify one or more ICAO Aerodrome Codes in the subscription request to filter the results to only those locations
Report Type - specify one or more of “METAR”, “SPECI” or “TAF” in the subscription request to filter the results to only these types of reports
One or both filters may be used in the subscription request.
If no filtering option is specified, then all messages will be subscribed to.
Service Technical Conformance 
The Aerodrome Weather data service supports the following technical requirements:
| Area | Specification | Requirement | Comment |
|---|---|---|---|
| Authentication | Airservices Australia GOLD Technical Infrastructure Profile | None | |
| Authorisation | Airservices Australia GOLD Technical Infrastructure Profile | None | |
| Confidentiality | Airservices Australia GOLD Technical Infrastructure Profile | None | |
| Message Payload | IWWXM V3.0 | Mandatory | |
| Message Validation | IWWXM V3.0 | Mandatory: Validate to METAR, SPECI and TAF IWXXM XML schemas | |
| Message Exchange Pattern | Airservices Australia GOLD Technical Infrastructure Profile | Mandatory: Advanced Message Queuing Protocol (AMQP) Version 1.0 | |
| etc | etc |
NOTE: The Airservices Australia GOLD Technical Infrastructure Profile will be developed soon
Additional Service Information 
The Aerodrome Weather data service is the first one we have ever described!
Provider Organization 
Airservices Australia
Provider Point of Contact 
Data Services Team
Email: data@airservicesaustralia.aero
Phone: +555 555 555
Support Availability 
Normal Business Hours 8AM to 6PM AEST
Service Description Provenance 
Version: 00.04
Last Updated: 2019-08-08