AC 21-45(0): Airworthiness Approval of Airborne Automatic Dependent Surveillance Broadcast Equipment
APPENDIX B
ADS-B OUT DATA
Table 1: Required Characteristics of Mandatory ADS-B “Out” Data
Item Parameter Range Minimum Resolution Accuracy Limits Maximum Data Age at Transmission Remarks ADS-B transmitter specification
1 Identity/Call Sign 8 characters N/A N/A 60 seconds ICAO Annex 10, Vol IV, para 3.1.2.9
2 Position Any latitude and longitude on earth - 2 seconds ICAO Annex 10, Vol IV, para 3.1.2.8.6.6 and Vol III, Part I, App to Chap 5 para 2.3.2.3
3 Pressure -1000 ft to 100 ft As the 2 seconds ICAO Annex 10, Vol IV, para
Altitude maximum (Gillham’s installed 3.1.2.6.5.4 referenced to 1013.25
certificated code) or 25 sensor hPa and Vol III, Part I, App to Chap
altitude of ft as 5 para 2.3.2.4
aircraft plus 5000 provided by the
ft source
4 Integrity Value Value 0-9 1 N/A 2 seconds ICAO Annex 10, Vol III, Part I, App to Chap 5 para 2.3.1
Table 2: Required Characteristics of Desirable ADS-B “Out” Data
1 SPI Indication
2 Emergency Flag
3 Emergency Type Indicator
4 Velocity Information - - 2 seconds ICAO Annex 10, Vol IV, para 3.1.2.8.6.6 and Vol III, Part I, App to Chap 5 para 2.3.5
5 GNSS Height
6 Vertical rate (GNSS/BARO)
APPENDIX C
SELF EVALUATION CHECKLIST
ADS-B Transmitter Manufacturer & Model number
GNSS positional source Manufacturer & Model number
GNSS receiver TSO TSO C145a/ TSO C146a / Other
If not TSO C145a or TSO C146a compliant x Not required until June 2012, refer CAO 20.18. Confirm supports Fault Detection Exclusion (FDE) x Confirm outputs HPL or HIL x Is BARO aiding provided to GNSS receiver?
Transmitter Message formats compliant with (Circle one) x ICAO Annex 10, Amendment 77; or x DO-260; or x DO-260A or TSO C166
Transmitter characteristics compliant with (Circle one) x ATSO-C1004 (Type G1 only); or x ATSO-1C74c x TSO-C112 and compliant with DO-181c; or x ETSO-2C11;2 or x ED73B or DO-181 x ATSO-C1005
HPL is provided to ADS-B transmitter on same interface as GNSS positional data and tested YES/NO
Suitable barometric encoder (pressure altitude) data provided to transmitter and tested? YES/NO
Uses aircrafts own ATC transponder antenna? YES/NO
If not using the aircrafts own ATC antenna, has antenna been mounted in accord with transponder mounting rules? YES/NO
Flight ID source installed and tested? (Circle one) Programmed/ pilot entry panel/ Flight Management System interface
Optional data supported and tested (Circle those verified) SPI indication Emergency flag Ground track / Ground speed velocity vector Emergency type indicator GNSS height GNSS vertical rate BARO vertical rate
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