The" ILS glideslope antenna TRSH" distance defines the location of the antenna with respect to the runway threshold. The "Localizer antenna rwy end distance" defines the location of the facility antenna relative to one end of the runway in terms of a distance.
Localizer antenna rwy end distance & ILS glideslope antenna TRSH distance, ILS DME antenna TRSH distance & ILS marker TRSH distance The example below shows the publication of the LLZ course width in an AIP. In case either the true or the magnetic bearing is provided, for the other attributes a nilReason should be provided. The accuracy required by PANS-AIM is 1/100 degree.
#Localizer vs vor frequencies code#
The ueBearing and ueBearingAccuracy attributes are used to code that information. This also is an inbound course value, when going towards the Localizer antenna. the measured angle between the localizer beam and True North at the localizer antenna. Anyhow, PANS-AIM also requires to code the true bearing, i.e. In general, this information is published on an approach chart.Īt some locations of the world, rather a true than a magnetic bearing may be published for the Localizer course. In addition, the Localizer.magneticBearingAccuracy is used to provide the corresponding accuracy value. This is the inbound course value, when going towards the Localizer antenna, as normally provided in AIS publications. The magnetic bearing of a Localizer (or Localizer course) is the measured angle between the localizer beam and Magnetic North at the localizer antenna and is coded using the Localizer.magneticBearing attribute. Positionįor more details see topic Navaid Position & Elevation. Localizer and glidepath frequency will be paired according to ICAO Annex 10, Volume I. The glide path equipment shall operate in the band 328.6 MHz to 335.4 MHz. The localizer shall operate in the band 108 MHz to 111.975 MHz. For both Glidepath and Localizer, only the value equal-to ' MHZ' shall be used. The corresponding data type ValFrequencyType contains an uom attribute. However, there is a coding rule that defines a range of acceptable values. This can be any decimal value greater than 0. The equency attribute is used to code the value of the frequency of the glidepath. The equency attribute is used to code the value of the frequency of the localizer. For details about the encoding including rules see the topic Magnetic Variation. Magnetic Variationįor ILS, PANS-AIM Appendix 1 requires the magnetic variation to be provided. In case naming conventions are applied they should be consistent for all data provided by the same data provider. However, local naming conventions may be applied (e.g. In general, neither the Navaid nor the Localizer nor the Glidepath will have a name. The Navaid shall carry the same designator as the Localizer. If yes, it shall be identical to the designator of the localizer. In general, the Glidepath will not have a value for the designator attribute. The Localizer will have a designator coded. The main classes are Localizer and Glidepath, which are specialisations of the NavaidEquipment. The diagram below shows the AIXM classes, including the relevant data types and code lists, needed to encode that information. Facility coverage shall be indicated in the remarks column.
If the operating authority of the facility is other than the designated governmental agency, the name of the operating authority shall be indicated in the remarks column. and for VOR/ILS/MLS also station declination. type of supported operation for ILS/MLS. In addition, PANS-AIM AD 2.19/AD 3.18 require identification, name, aerodrome served, hours of operation, magnetic variation, frequency., position. Where only one locator is used as a supplement to the ILS, preference should be given to location at the site of the outer marker beacon.įor an ILS & Localizer system, PANS-AIM requires some specific properties as part of the minimum AIP data set. They should be located at the sites of the outer and middle marker beacons. For general PANS-AIM requirements valid for all kind of Radio navigation aids, see topic Navaid and subordinated pages.Īccording to ICAO Annex 10, Volume I, the ILS shall comprise the following basic components:Ī) VHF localizer equipment (for horizontal guidance),ī) UHF glide path equipment (for vertical guidance),Ĭ) VHF marker beacons, or distance measuring equipment (DME) (for range information).Ī standalone instrument approach installation without an associated glidepath is a Localizer system (also called Localizer only or Localizer without GP, etc.)Īlso locators (NDB) may be used as a supplement to the ILS/localizer system. This topic contains only those PANS-AIM requirements, which are relevant for an Instrument Landing System (ILS) and a Localizer only system.
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