Technical Provisions for Mode S Services and Extended Squitter

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B-20 Technical Provisions for Mode S Services and Extended Squitter 4. TS (Target State Report Capability) 0 = No capability for sending messages to support Target State Reports 1 = Capability of sending messages to support Target State Reports 5. TC (Target Change Report Capability) 0 = No capability for sending messages to support Trajectory Change Reports 1 = Capability of sending messages to support TC+0 Report only 2 = Capability of sending information for multiple TC Reports 3 = Reserved Surface Capability Class (CC) Code for Version 1 Systems Msg Bit # 41 42 43 44 45 46 47 48 49 50 51 52 “ME” Bit # 9 10 11 12 13 14 15 16 17 18 19 20 Content Subfield Coding: Service level MSBs = 0 0 POA CDTI 1. CDTI (Cockpit Display of Traffic Information) 0 = Traffic display not operational 1 = Traffic display operational Service level LSBs = 0 0 2. POA (Position Offset Applied) 0 = Position transmitted is not the ADS-B position reference point 1 = Position transmitted is the ADS-B position reference point 3. B2 Low (Class B2 transmit power less than 70 Watts) 0 = Greater than or equal to 70 Watts transmit power 1 = Less than 70 Watts transmit power B.2.3.10.4 OPERATIONAL MODE (OM) B2 Low Reserved Draft This 16-bit (ME bits 25–40, message bits 57–72) subfield shall be used to indicate the operational modes that are active on board the aircraft. Encoding of the subfield shall be as specified in the following table. Msg Bit # 57 58 59 60 61 62-72 “ME” Bit # 25 26 27 28 29 30-40 OM format DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris 0 0 ACAS RA active 0 1 Reserved 1 0 Reserved 1 1 Reserved IDENT switch active Receiving ATC services Reserved DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris
Appendix B B-21 Subfield Coding: DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris 1. ACAS Resolution Advisory (RA) active 0 = ACAS II or ACAS RA not active 1 = ACAS RA is active 2. IDENT switch active 0 = Ident switch not active 1 = Ident switch active — retained for 18 ±1 seconds 3. Receiving ATC services 0 = Aircraft not receiving ATC services 1 = Aircraft receiving ATC services B.2.3.10.5 EXTENDED SQUITTER VERSION NUMBER This 3-bit (ME bits 41–43, message bits 73–75) subfield shall be used to indicate the version number of the formats and protocols in use on the aircraft installation. Encoding of the subfield shall be as specified in the following table. Coding (Binary) (Decimal) Extended squitter version number subfield Meaning 000 0 Conformant to Doc 9871, 1st Edition, Appendix A 001 1 Conformant to Doc 9871, 1st Edition, Appendix B 010 – 111 2 – 7 Reserved B.2.3.10.6 NAVIGATION INTEGRITY CATEGORY (NIC) AND NIC SUPPLEMENT Draft This B.2.3.10.6.1 The NIC supplement is a 1-bit (ME bit 44, message bit 76) subfield that shall be used in conjunction with the TYPE Code to encode the navigation integrity category (NIC) of the transmitting ADS-B participant to allow surveillance applications to determine whether the reported geometric position has an acceptable integrity containment region for the intended use. Encoding of the NIC Supplement subfield shall be as specified in the following table. If an update has not been received from an on-board data source for the NIC Supplement subfield within the past 5 seconds, then the NIC Supplement subfield shall be encoded to indicate that RC is “Unknown.” Note. — The first 5-bit field (“ME” bits 1–5, Message bits 33–37) in every Mode S extended squitter message contains the format TYPE code. The format TYPE code differentiates the messages into several classes: Airborne Position, Airborne Velocity, Surface Position, Identification, Aircraft Intent, Aircraft State, etc. In addition, the format TYPE code also encodes the Navigation Integrity Category (NIC) value of the source used for the position report. The NIC value is used to allow surveillance applications to determine whether the reported geometric position has an acceptable level of integrity containment region for the intended use. The NIC integrity containment region is described horizontally and vertically using two parameters: the containment radius, RC, and the Vertical Protection Limit, VPL. The format TYPE code also differentiates the Airborne Messages as to the type of their altitude measurements: barometric pressure altitude or GNSS height (HAE). The 5-bit encoding for format TYPE code and NIC values conform to the definition contained in the table in §B.2.3.1. DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris
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Appendix C C-25 Notes.— DRAFT - W
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Msg Bit # “ME” Bit # Appendix C
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Appendix C C-33 Msg Bit # "ME” Bi
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Appendix C C-59 Register 0516 DRAFT
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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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Appendix CD CD-27 Zone no. DRAFT -
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Technical Provisions for Mode S Services and Extended Squitter

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