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Technical Provisions for Mode S Services and Extended Squitter

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DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris<br />

Appendix A A-51<br />

Table A-2-16. BDS code 1,0 — Data link capability report (concluded)<br />

11) Bit 33 indicates the availability of Aircraft Identification data. It shall be set by the<br />

transponder if the data comes to the transponder through a separate interface <strong>and</strong><br />

not through the ADLP.<br />

12) The <strong>Mode</strong> S subnetwork version number shall be coded as follows:<br />

Version<br />

Number<br />

ICAO RTCA EUROCAE<br />

0 <strong>Mode</strong> S subnetwork not available<br />

1 ICAO Doc 9688 (1996)<br />

2 ICAO Doc 9688 (1998)<br />

3 ICAO Annex 10, Vol III, Amdt 77<br />

4 ICAO Doc 9871, Edition 1 DO-181D ED-73C<br />

5 ICAO Doc 9871, Edition 2 DO-181E ED-73E<br />

6 - 127 Reserved<br />

13) Uplink ELM average throughput capability shall be coded as follows:<br />

0 = No UELM Capability<br />

1 = 16 UELM segments in 1 second<br />

2 = 16 UELM segments in 500 ms<br />

3 = 16 UELM segments in 250 ms<br />

4 = 16 UELM segments in 125 ms<br />

5 = 16 UELM segments in 60 ms<br />

6 = 16 UELM segments in 30 ms<br />

7 = Reserved<br />

14) Downlink ELM throughput capability shall be coded as follows:<br />

0 = No DELM Capability<br />

1 = One 4 segment DELM every second<br />

2 = One 8 segment DELM every second<br />

3 = One 16 segment DELM every second<br />

4 = One 16 segment DELM every 500 ms<br />

5 = One 16 segment DELM every 250 ms<br />

6 = One 16 segment DELM every 125 ms<br />

7-15 = Reserved<br />

15) Bit 16 shall be set to ONE (1) to indicate that ACAS is operational <strong>and</strong> set to<br />

ZERO (0) to indicate that ACAS has failed or is on st<strong>and</strong>by.<br />

16) Bit 37 shall be set to ONE (1) to indicate the capability of hybrid surveillance,<br />

<strong>and</strong> set to ZERO (0) to indicate that there is no hybrid surveillance capability.<br />

Draft<br />

17) Bit 38 shall be set to ONE (1) to indicate that the ACAS is generating both TAs<br />

<strong>and</strong> RAs, <strong>and</strong> set to ZERO (0) to indicate the generation of TAs only.<br />

18)<br />

Bit 40 Bit 39 Applicable MOPS Documents<br />

0 0 RTCA DO-185 (see note 1)<br />

0 1 RTCA DO-185A (see note 1)<br />

1 0 RTCA DO-185B<br />

1<br />

Notes.–<br />

1 Reserved <strong>for</strong> future versions<br />

1. RTCA DO-185 equipment is also referenced as TCAS logic version 6.04A.<br />

Equipment compliant to DO-185A, or later versions, are SARPs compliant.<br />

2. Future versions of ACAS will be identified using Part Numbers <strong>and</strong> Software<br />

Version Numbers specified in Registers E516 <strong>and</strong> E616.<br />

19) The Overlay Comm<strong>and</strong> Capability (OCC) in Bit 15 shall be interpreted as follows:<br />

0 = No Overlay Comm<strong>and</strong> Capability<br />

1 = Overlay Comm<strong>and</strong> Capability<br />

Note.– Additional implementation guidelines are provided in §D.2.4.1.<br />

DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris

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