411 REFERENCE · Wiktionary
Gillham code
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after Ronald Lionel Gillham, a signals officer.
Noun
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en aviation A zero-padded 12-bit binary code, a modified Gray code, used to transmit uncorrected barometric altitude between an encoding altimeter or analog air data computer and a digital transponder.
Related terms
en Gillham interface
en eponyms