Technical Provisions for Mode S Services and Extended Squitter

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B-50 Technical Provisions for Mode S Services and Extended Squitter MB FIELD DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris 1 IMF (see §B.3.4.1.1) 2 MSB SURVEILLANCE STATUS 3 LSB (see Annex 10, Volume IV, §3.1.2.8.6.3.1.1) 4 MSB 5 SERVICE VOLUME ID (SVID) 6 (see §B.3.4.5.2) 7 LSB 8 9 10 11 MSB 12 13 PRESSURE-ALTITUDE 14 (This is the altitude code (AC) as specified in §3.1.2.6.5.4 15 16 17 18 of Annex 10, Volume IV, but with the M-bit removed) 19 LSB 20 GROUND TRACK STATUS (1 = valid, 0 = invalid) 21 22 MSB 23 GROUND TRACK ANGLE 24 (see §B.3.4.5.5) 25 LSB 26 27 MSB 28 GROUND SPEED 29 30 (see §B.3.4.5.6) 31 LSB 32 CPR FORMAT (F) (0 = even, 1 = odd) 33 34 35 36 37 MSB 38 39 CPR ENCODED LATITUDE 40 41 42 43 (see §B.3.4.5.7) 44 LSB 45 46 47 48 49 MSB 50 51 CPR ENCODED LONGITUDE 52 53 54 55 (see §B.3.4.5.7) 56 LSB Table B-3-5. TIS-B coarse airborne position message PURPOSE: To provide airborne position information for aircraft that are not equipped with 1 090 MHz ADS-B when the TIS-B service is based on moderate quality surveillance data. Surveillance status shall be coded as follows: 0 = No condition information 1 = Permanent alert (emergency condition) 2 = Temporary alert (change in Mode A identity code other than emergency condition) 3 = SPI condition Codes 1 and 2 shall take precedence over code 3. Draft DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris
DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris Appendix B B-51 B.4. ADS-B REBROADCAST (ADS-R) FORMATS AND CODING B.4.1 INTRODUCTION Notes. — 1.— This section defines the formats and coding for an ADS-B Rebroadcast (ADS-R) Service based on the same 112-bit 1 090 MHz extended squitter signal transmission that is used for ADS-B messages on 1 090 MHz. 2.— ADS-R complements the operation of ADS-B and TIS-B by providing ground-to-air rebroadcast of ADS-B data about aircraft that are not equipped for 1 090 MHz extended squitter ADS-B, but are equipped with an alternate form of ADS-B (e.g. universal access transceiver (UAT)). The basis for the ADS-R transmission is the ADS-B report received at the ground station using a receiver compatible with the alternate ADS-B data link. 3.— The ADS-R ground-to-air transmissions use the same signal formats as the 1 090 MHz extended squitter ADS- B and can therefore be accepted by a 1 090 MHz ADS-B receiving subsystem, with the exceptions identified in the following sections. B.4.2 ADS-B REBROADCAST FORMAT DEFINITIONS ADS-B rebroadcast information shall be transmitted using the 112-bit Mode S DF=18 format. B.4.3 CONTROL FIELD ALLOCATION The content of the DF=18 transmission shall be defined by the value of the control field (CF). ADS-B rebroadcast transmissions shall use CF=6. Draft B.4.4 ADS-B REBROADCAST SURVEILLANCE MESSAGE DEFINITIONS Note.— The rebroadcast of ADS-B information on the 1 090 MHz extended squitter data link is accomplished by utilizing the same ADS-B message formats defined in the tables in Section 2 of this appendix, with the exception of the need to transmit an indication to the 1 090 MHz receiving subsystem as to the type of identity associated with the aircraft data being reported in the ADS-B rebroadcast message. This identification is performed using the ICAO/Mode A flag (IMF), which is defined in §B.3.3.1. B.4.4.1 REBROADCAST AIRBORNE POSITION MESSAGE The ME Field of the rebroadcast airborne position message shall be formatted as specified in Table A-2-5, except that ME bit 8 shall be redefined to be the ICAO/Mode A flag (IMF). This bit shall be defined as follows: IMF = 0 shall indicate that the ADS-B rebroadcast data is identified by an ICAO 24-bit address. IMF = 1 shall indicate that the ADS-B rebroadcast data is identified by an anonymous 24-bit address, or ground vehicle address, or fixed obstruction address. DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris
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Appendix A A-97 a) the PI sends a T
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Appendix A A-109 A.4. MODE S BROADC
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Appendix CD CD-3 ACTIONS EVENTS DRA
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Appendix CD CD-13 CD.2.4.4.1.2 Poss
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Appendix CD CD-23 CD.2.4.7.5 BINARY
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Technical Provisions for Mode S Services and Extended Squitter

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