15.12.2012 Views

Technical Provisions for Mode S Services and Extended Squitter

Technical Provisions for Mode S Services and Extended Squitter

Technical Provisions for Mode S Services and Extended Squitter

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

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

Appendix CD CD-19<br />

BDS<br />

bit no.<br />

Data<br />

bit no. Description<br />

27<br />

28 Ground speed<br />

29 ARINC label 312<br />

30<br />

31 Range = [0, 2 046]<br />

32<br />

33<br />

34 LSB = 1 024/512 = 2kt<br />

35 STATUS 1 = valid data<br />

36 SIGN 1 = minus<br />

37 MSB = 8 degrees/s<br />

38<br />

39 Track angle rate<br />

40 ARINC label 335<br />

41<br />

42 Range = [ -16, +16]<br />

43<br />

44<br />

45 LSB = 8/256 degrees<br />

46 STATUS 1 = valid data<br />

47 MSB = 1 024 kt<br />

48<br />

49 True air speed<br />

50 ARINC label 210<br />

51<br />

52 Range = [0, 2 046]<br />

53<br />

54<br />

55<br />

56 LSB = 1 024/512 = 2 kt<br />

The status bits are determined as explained in §A.2.2.2. The data is rounded as specified in §A.2.2.2. The encoding<br />

accuracy of the data in the subfield is ±½ LSB by rounding.<br />

For ARINC GAMA configuration, label 335 is not used <strong>for</strong> the track angle rate but <strong>for</strong> another parameter. For this<br />

particular ARINC configuration the track angle rate field should be loaded with all zeroes. In such cases, ground<br />

applications can compute the equivalent of the track angle rate thanks to the true air speed <strong>and</strong> the roll angle in<strong>for</strong>mation.<br />

Draft<br />

CD.2.4.6 TRANSPONDER REGISTER 6016<br />

When ARINC 429 data is used an example, implementation is the following:<br />

BDS Data<br />

bit no. bit no. Description<br />

1 STATUS 1 = valid data<br />

2 SIGN 1 = West (eg.315 degrees= -45 degrees)<br />

3<br />

4<br />

5<br />

MSB = 90 degrees<br />

6 Magnetic heading<br />

7<br />

8<br />

ARINC label 320<br />

9<br />

10<br />

11<br />

Range = [-180, +180]<br />

12 LSB = 90/512 degrees<br />

13 STATUS 1 = valid data<br />

14<br />

15<br />

MSB = 512 kt<br />

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

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!