PANS-AIM requires for the routeSegment
an indication of the controlling unit, its operating channel and, if applicable, its logon address, SATVOICE number, and any navigation, RCP and RSP specification(s) limitations.
AIXM 5.1.1 issue
AIXM does not provide a direct relaionship between Unit and RouteSegment class.
The concerned Unit has to be encoded independently. According to the PANS-AIM Appendix 1 (Aeronautical Data Catalogue) at least the name shall be provided.
In addition, a Service provided by the Unit has to be encoded. The Service class has several specialised classes that have an association to a RoutePortion. One or morre of this services may be provided for the same RoutePortion.
- AirTrafficControlService
- InformationService
- SearchRescueService
The type of service provided may be defined by the attribute Service,type, or it may be included in the Service.name, or it may be included in the Unit.name.
Open Question
Which of the 3 options shall be layed down as coding rule?
The operation channel is encoded using the RadioCommunicationChannel class. The attribute frequencyTransmission will carry the corresponding value and uom. The RadioCommunicationChannel has to be referenced by the adequate Service.
According to the PANS-AIM Appendix 1 (Aeronautical Data Catalogue) a specified code used for data link logon to the controlling ATS unit shall be provided if applicable.
AIXM 5.1.1 issue
Depending on the specialised Service class different ways of encoding this information are provided by AIXM. A consolidation may be needed!
The AirTrafficControlService class contains two relevant atributes: dataLinkEnabled and dataLinkChannel.
The InformationService class contains one relevant atribute: dataLink.
The SearchRescueService class does not contain any relevant atribute.
However, via the ContactInformation class related to the Service class corresponding attributes of the OnlineContact class may be used to encode that information.The code list for the network attribute contains a value ACARS; which is defined as
Aircraft Communications Addressing and Reporting System. A datalink system that enables ground stations (airports, aircraft maintenance bases, etc.) and commercial aircraft to communicate without voice using a datalink system.
The linkage and protocol attribute may then be used to define the details about the logon adress.
The figure below show how the information about the controlling unit is published in an AIP:
