...
SDF is not explicitly mentioned in PANS-AIM. Hence, for the purpose of in it is noct covered in this coding guidelines the specific requirements are derived form those specified for the localiser in PANS-AIM.
The diagram below shows the AIXM classes, including the relevant data types, needed to encode that information The main class is the SDF which is a specialisation of the NavaidEquipment.
Frequency
The SDF.frequency attribute is used to code the value of the frequency.
Localiser Course (bearing)
The magnetic bearing of a SDF (or SDF course) is the measured angle between the localizer beam and Magnetic North at the SDF antenna is coded using the SDF.magenticBearing attribute. In additio the is used to provide the corresponding accuracy value. In general this information is published on an approach chart.
At some locations of the world rather a true than a magteic bearing may be publsihed for the SDF course. The SDF.trueBearing attribute is used to code that information.
In case either the true or the magnetic bearing is provided for the other attribute a nilReason should be provided.
Coding Rules for SDF
Identifier
...
Coding Examples
TBD