Technical Provisions for Mode S Services and Extended Squitter

DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris
Appendix C C-91
Version 0
Message
TYPE CODE
Message Format
Table C-44. SIL Reporting
Probability of Exceeding the Horizontal
Containment Radius
(RC)
ADS-B
Report
SIL
value
0 No Position Info No Integrity 0
5 Surface Position 1 X 10 -5 per flight hour or per sample 2
6 Surface Position 1 X 10 -5 per flight hour or per sample 2
7 Surface Position 1 X 10 -5 per flight hour or per sample 2
8 Surface Position 1 X 10 -5 per flight hour or per sample 2
9 Airborne Position 1 X 10 -5 per flight hour or per sample 2
10 Airborne Position 1 X 10 -5 per flight hour or per sample 2
11 Airborne Position 1 X 10 -5 per flight hour or per sample 2
12 Airborne Position 1 X 10 -5 per flight hour or per sample 2
13 Airborne Position 1 X 10 -5 per flight hour or per sample 2
14 Airborne Position 1 X 10 -5 per flight hour or per sample 2
15 Airborne Position 1 X 10 -5 per flight hour or per sample 2
16 Airborne Position 1 X 10 -5 per flight hour or per sample 2
17 Airborne Position 1 X 10 -5 per flight hour or per sample 2
18 Airborne Position No Integrity 0
20 Airborne Position 1 X 10 -5 per flight hour or per sample 2
21 Airborne Position 1 X 10 -5 per flight hour or per sample 2
22 Airborne Position No Integrity 0
C.5.2.2.13 Barometric Altitude Integrity Code (NICBARO)
The Barometric Altitude Integrity Code (NICBARO) parameter of the ADS-B Report is a 1-bit flag used to
indicate if the barometric altitude being reported in the ADS-B Report has been cross-checked against
another source of pressure altitude. The ADS-B Version Zero (0) Messages do not include information
related to the cross-checking of barometric altitude. Therefore, ADS-B Reports for target aircraft/vehicles
broadcasting ADS-B Version Zero (0) Messages will shall not include the NICBARO field in the report.
C.5.2.2.14 Track/Heading and Horizontal Reference Direction (HRD)
Draft
ADS-B Version Zero (0) Airborne Velocity Messages with Subtype equal to 3 or 4 include a “Magnetic
Heading Status Bit” as shown in Table A-2-9b. A Version Two (2) 1090 MHz ADS-B Receiving Subsystem,
upon receiving an Airborne Velocity Message with a Subtype of 3 or 4, must decode the Magnetic Heading
Status Bit to determine if Magnetic Heading Data is “Available.” The ADS-B Receiving Subsystem will shall
set the value of the True/Magnetic Heading subfield, as specified in Table C-45.
DRAFT - Working Paper ASP TSGWP11-01 for review by the TSG during the meeting in June 2011 in Paris