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How many labels are defined in ARINC 429 for calibrated altitude?

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  • $\begingroup$ What Equipment ID are you interested in? $\endgroup$ May 6, 2019 at 13:20
  • $\begingroup$ I dont know it................. $\endgroup$ May 6, 2019 at 15:08
  • $\begingroup$ Are you trying to decode an ARINC label or figure out what label to send the data as or something else? By "calibrated" to mean baro corrected? $\endgroup$ May 6, 2019 at 15:21
  • $\begingroup$ I find out what is the Arinc label for calibrated alt data? $\endgroup$ May 6, 2019 at 15:36
  • $\begingroup$ In my copy of ARINC 429 (2004), there is no label defined for "calibrated altitude". There are labels defined for [Pressure] Altitude (1013.2 mbar) and Baro Corrected Altitude. What exactly are you trying to indicate? $\endgroup$ May 6, 2019 at 17:52

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There is no defined "calibrated altitude". The following are all altitude related labels:

  • 102 Selected Altitude,

  • 107 Selected Cruise Altitude,

  • 120 Range to Altitude,
  • 127 Selected Landing Altitude,
  • 131 Intruder Altitude,
  • 144 Altitude Error,
  • 153 Max Altitude,
  • 162 Density Altitude,
  • 164 Min Descent Altitude (MDA),
  • 203 Altitude,
  • 204 Baro Corrected Altitude #1 & Baro Altitude,
  • 206 Altitude (Variable Resolution),
  • 212 Altitude Rate,
  • 220 Baro Corrected Altitude #2,
  • 225 Compensated Altitude Rate,
  • 251 Baro Corrected Altitude #3,
  • 252 Baro Corrected Altitude #4,
  • 254 Altitude Rate,
  • 323 Geometric Altitude,
  • 361 Altitude (Inertial)
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In ARINC 429 a label refers to a parameter, for instance AOA (angle of attack). When you have several sensors for the same parameter, the same label is used for all sensors but 2 additional digits (SDI, Source Destination Identifier) are used to distinguish them, for instance left AOA and right AOA.

As a summary, a parameter can't use several labels but the same label might refer to similar parameters from different sources or sensors.

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