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Instrument Landing System (ILS) Reference Datum Height (IRD)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: ird.ttl
- Name
ilsReferenceDatumHeight- Datatype
- Real
- Definition
- The height of a point that is located above the intersection of the runway centre line and the threshold and through which the downward extended straight portion of the glide path passes.
- Accepted
- 2013-10-18
- Defined by
- DFDD
- Physical quantity
- length
- Recommended unit
- Metre (m)
- Used by
- GA098 Instrument Landing System (ILS) Glide Path
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.