• ICAO 9871
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ICAO 9871

  • Technical Provisions for Mode S Services and Extended Squitter (Doc 9871 AN/460)
  • Handbook / Manual / Guide by International Civil Aviation Organization, 2012
  • Publisher: ICAO

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The purpose of this manual is to specify technical provisions for the formats and associated protocols used in Mode S services and extended squitter. The manual also includes implementation guidelines as well as information on future Mode S and extended squitter services that are under development. The provision of Mode S services, specified in this document, include the following:
  • data formats for transponder registers;
  • formats for Mode S specific protocols: traffic information broadcast and dataflash
  • Mode S broadcast protocols, including uplink broadcast and downlink broadcast

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