Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2322

c) after time-out and in the absence of RCS codes 1 and 2, control shall return to TRS. 3.1.2.8.6.10 Latitude/longitude coding using compact position reporting (CPR). Mode S extended squitter shall use compact position reporting (CPR) to encode latitude and longitude efficiently into messages. Note.— The method used to encode/decode CPR is specified in the Technical Provisions for Mode S Services and Extended Squitter (Doc 9871). 3.1.2.8.6.11 Data insertion. When the transponder determines that it is time to emit an airborne position squitter, it shall insert the current value of the barometric altitude (unless inhibited by the ATS subfield, 3.1.2.8.6.8.2) and surveillance status into the appropriate fields of register 05 {HEX}. The contents of this register shall then be inserted into the ME field of DF = 17 and transmitted. Note.— Insertion in this manner ensures that (1) the squitter contains the latest altitude and surveillance status, and (2) ground read-out of register 05 {HEX} will yield exactly the same information as the AC field of a Mode S surveillance reply. 3.1.2.8.7 EXTENDED SQUITTER/SUPPLEMENTARY, DOWNLINK FORMAT 18 CF:3 PI:24 Note 1.— This format supports the broadcast of extended squitter ADS-B messages by non-transponder devices, i.e. they are not incorporated into a Mode S transponder. A separate format is used to clearly identify this non-transponder case to prevent ACAS II or extended squitter ground stations from attempting to interrogate these devices. Note 2.— This format is also used for ground broadcast of ADS-B related services such as traffic information broadcast (TIS-B). Note 3.— The format of the DF = 18 transmission is defined by the value of the CF field. 3.1.2.8.7.1 ES supplementary format. The format used for ES supplementary shall be a 112-bit downlink format (DF = 18) containing the following fields: Field Reference DF downlink format 3.1.2.3.2.1.2 CF control field 3.1.2.8.7.2 PI parity/interrogator identifier 3.1.2.3.2.1.4 The PI field shall be encoded with II equal to zero. 3.1.2.8.7.2 Control field. This 3-bit (6-8) downlink field in DF = 18 shall be used to define the format of the 112-bit transmission as follows. Code 0 = ADS-B ES/NT devices that report the ICAO 24-bit address in the AA field (3.1.2.8.7) Annex 10 — Aeronautical Telecommunications Volume IV 22/11/07 3-58 Code 1 = Reserved for ADS-B for ES/NT devices that use other addressing techniques in the AA field (3.1.2.8.7.3) Code 2 = Fine format TIS-B message Code 3 = Coarse format TIS-B message Code 4 = Reserved for TIS-B management messages Code 5 = TIS-B messages that relay ADS-B messages that use other addressing techniques in the AA field Code 6 = ADS-B rebroadcast using the same type codes and message formats as defined for DF = 17 ADS-B messages Code 7 = Reserved Note 1.— Administrations may wish to make address assignments for ES/NT devices in addition to the 24-bit addresses allocated by ICAO (Annex 10, Volume III, Part I, Chapter 9) in order to increase the available number of 24-bit addresses. Note 2.— These non-ICAO 24-bit addresses are not intended for international use. 3.1.2.8.7.3 ADS-B for extended squitter/non-transponder (ES/NT) devices CF=0 AA:24 ME:56 PI:24 3.1.2.8.7.3.1 ES/NT format. The format used for ES/NT shall be a 112-bit downlink format (DF = 18) containing the following fields: Field Reference DF downlink format 3.1.2.3.2.1.2 CF control field = 0 3.1.2.8.7.2 AA address, announced 3.1.2.5.2.2.2 ME message, extended squitter 3.1.2.8.6.2 PI parity/interrogator identifier 3.1.2.3.2.1.4 The PI field shall be encoded with II equal to zero. 3.1.2.8.7.3.2 ES/NT squitter types 3.1.2.8.7.3.2.1 Airborne position squitter. The airborne position type ES/NT shall use format DF = 18 with the format for register 05 {HEX} as defined in 3.1.2.8.6.2 inserted in the ME field. 3.1.2.8.7.3.2.2 Surface position squitter. The surface position type ES/NT shall use format DF = 18 with the format for register 06 {HEX} as defined in 3.1.2.8.6.2 inserted in the ME field. 3.1.2.8.7.3.2.3 Aircraft identification squitter. The aircraft identification type ES/NT shall use format DF = 18 with the format for register 08 {HEX} as defined in 3.1.2.8.6.2 inserted in the ME field. 3.1.2.8.7.3.2.4 Airborne velocity squitter. The airborne velocity type ES/NT shall use format DF = 18 with the format for register 09 {HEX} as defined in 3.1.2.8.6.2 inserted in the ME field. 3.1.2.8.7.3.2.5 Event-driven squitter. The event-driven type ES/NT shall use format DF = 18 with the format for register 0A {HEX} as defined in 3.1.2.8.6.2 inserted in the ME field. Chapter 3 Annex 10 — Aeronautical Telecommunications 3-59 22/11/07 3.1.2.8.7.3.3 ES/NT squitter rate 3.1.2.8.7.3.3.1 Initialization. At power up initialization, the non-transponder device shall commence operation in a mode in which it does not broadcast any squitters. The non-transponder device shall initiate the broadcast of ES/NT squitters for airborne position, surface position, airborne velocity and aircraft identification when data are available for inclusion in the ME field of these squitter types. This determination shall be made individually for each squitter type. When ES/NT squitters are broadcast, transmission rates shall be as indicated in 3.1.2.8.6.4.2 to 3.1.2.8.6.4.6. Note 1.— This suppresses the transmission of extended squitters from aircraft that are unable to report position, velocity or identity. If input to the register for squitter types stops for 60 seconds, broadcast for this extended squitter type will cease until data insertion resumes, except for an ES/NT device operating on the surface (as specified for extended squitter Version 1 formats in the Technical Provisions for Mode S Services and Extended Squitter (Doc 9871). Note 2.— After timeout (3.1.2.8.7.6) this squitter type may contain an ME field of all zeros. 3.1.2.8.7.3.3.2 Delayed transmission. ES/NT squitter transmission shall be delayed if the non-transponder device is busy broadcasting one of the other squitter types. 3.1.2.8.7.3.3.2.1 The delayed squitter shall be transmitted as soon as the non-transponder device becomes available. 3.1.2.8.7.3.3.3 ES/NT antenna selection. Non-transponder devices operating with antenna diversity (3.1.2.10.4) shall transmit ES/NT squitters as follows:

Source: https://magyarkozlony.hu/hivatalos-lapok/1f7c6b0e16b4b71a92e5ad24416008bbe2e26aab/dokumentumok/710811d1f7f958a2990684d0cbf918e84f5497e5/letoltes