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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 />

B-52 <strong>Technical</strong> <strong>Provisions</strong> <strong>for</strong> <strong>Mode</strong> S <strong>Services</strong> <strong>and</strong> <strong>Extended</strong> <strong>Squitter</strong><br />

B.4.4.2 REBROADCAST SURFACE POSITION MESSAGE<br />

The ME field of the rebroadcast surface position message shall be <strong>for</strong>matted as specified in Table B-2-6, except that ME<br />

bit 21 is redefined to be the ICAO/<strong>Mode</strong> A flag (IMF). Coding of IMF flag shall be as specified in §B.4.4.1.<br />

B.4.4.3 REBROADCAST AIRCRAFT IDENTIFICATION AND CATEGORY MESSAGE<br />

The ME field of the rebroadcast aircraft identification <strong>and</strong> category message shall be <strong>for</strong>matted as specified in<br />

Table B-2-8.<br />

Note.— A rebroadcast aircraft identification <strong>and</strong> category message does not contain the IMF bit since aircraft using<br />

an anonymous 24-bit address will not provide identity <strong>and</strong> category in<strong>for</strong>mation.<br />

B.4.4.4 REBROADCAST AIRBORNE VELOCITY MESSAGE<br />

The ME field of the rebroadcast airborne velocity messages shall be <strong>for</strong>matted as specified in Table B-2-9a <strong>for</strong> subtype 1<br />

& 2 messages, <strong>and</strong> in Table B-2-9b <strong>for</strong> subtype 3 & 4 messages, except that ME bit 9 is redefined to be the ICAO/<strong>Mode</strong><br />

A flag (IMF). Coding of IMF flag shall be as specified in §B.4.4.1.<br />

B.4.4.5 REBROADCAST AIRCRAFT STATUS MESSAGE<br />

The ME field of the rebroadcast aircraft status message (subtype=1) shall be <strong>for</strong>matted as specified in Table B-2-97a,<br />

except that ME bit 56 is redefined to be the ICAO/<strong>Mode</strong> A flag (IMF). Coding of IMF flag shall be as specified in §B.4.4.1.<br />

B.4.4.6 RESERVED FOR THE REBROADCAST TARGET STATE AND STATUS MESSAGE<br />

B.4.4.7 REBROADCAST AIRCRAFT OPERATIONAL STATUS MESSAGE<br />

Draft<br />

The ME field of the rebroadcast aircraft operational status message shall be <strong>for</strong>matted as specified in Table B-2-101,<br />

except that ME bit 56 is redefined to be the ICAO/<strong>Mode</strong> A flag (IMF). Coding of IMF flag shall be as specified in §B.4.4.1.<br />

_____________________<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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