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Technical Provisions for Mode S Services and Extended Squitter

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Appendix A A-77<br />

MB FIELD<br />

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

Table A-2-84 to A-2-86. BDS codes 5,4 to 5,6 — Waypoints 1, 2 <strong>and</strong> 3<br />

1 STATUS (see 1)<br />

2 MSB<br />

3<br />

4 CHARACTER 1<br />

5<br />

6<br />

7 LSB<br />

8 MSB<br />

9<br />

10 CHARACTER 2<br />

11<br />

12<br />

13 LSB<br />

14 MSB<br />

15<br />

16 CHARACTER 3<br />

17<br />

18<br />

19 LSB<br />

20 MSB<br />

21<br />

22 CHARACTER 4<br />

23<br />

24<br />

25 LSB<br />

26 MSB<br />

27<br />

28 CHARACTER 5<br />

29<br />

30<br />

31 LSB<br />

32 MSB = 30 minutes<br />

33<br />

34 ESTIMATED TIME OF ARRIVAL<br />

35 (NORMAL FLIGHT)<br />

36<br />

37 Range = [0, 60] minutes<br />

38<br />

39<br />

40 LSB = 60/512 minutes<br />

41 MSB = 320 FL<br />

42<br />

43 ESTIMATED FLIGHT LEVEL<br />

44 (NORMAL FLIGHT)<br />

45 Range = [0, 630] FL<br />

46 LSB = 10 FL<br />

47 MSB = 30 minutes<br />

48<br />

49 TIME TO GO<br />

50 (DIRECT ROUTE)<br />

51<br />

52 Range = [0, 60] minutes<br />

53<br />

54<br />

55 LSB = 60/512 minutes<br />

56 RESERVED<br />

PURPOSE: To provide in<strong>for</strong>mation on the next three waypoints, register 5416<br />

contains in<strong>for</strong>mation on the next waypoint, register 5516 contains in<strong>for</strong>mation on<br />

the next waypoint plus one, <strong>and</strong> register 5616 contains in<strong>for</strong>mation on the next<br />

waypoint plus two.<br />

1) The single status bit shall be set to ZERO (0) if any of the parameters are<br />

invalid.<br />

2) The actual time or flight level shall be calculated from the trajectory<br />

scheduled in the FMS.<br />

Note.— <strong>Mode</strong> detail on the next waypoint is given in register 4116 to 4316.<br />

3) When the waypoint identity has only three characters, two leading ZERO<br />

characters shall be added (e.g. CDN becomes 00CDN).<br />

4) Estimated time is in minutes <strong>and</strong> all ones shall be used to indicate that the<br />

waypoint referred to is one hour or more away.<br />

Draft<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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