ICAO 9861 : 2012

PART I - DETAILED TECHNICAL SPECIFICATIONS
Chapter 1 - Introduction
Chapter 2 - UAT message data blocks
Chapter 3 - System timing and message transmission
            procedures
Chapter 4 - Criteria for successful message reception
Chapter 5 - Interface requirements for the aircraft
            equipment
PART II - IMPLEMENTATION ASPECTS
Chapter 1 - Introduction
Chapter 2 - Operating concepts
Chapter 3 - Scheduling of UAT ADS-B messages
Chapter 4 - UAT aircraft/vehicle ADS-B transmitting
            subsystem input requirements
Chapter 5 - UAT aircraft installation guidance
Chapter 6 - UAT ground infrastructure
Chapter 7 - UAT frequency planning criteria
Chapter 8 - Guidance on UAT spurious emissions
Chapter 9 - Potential future services of UAT
APPENDICES
Appendix A - UAT system performance simulation results
Appendix B - Standard interference environments
Appendix C - UAT receiver performance in the presence
             of DME/TACAN, JTIDS/MIDS and self-interference
Appendix D - UAT error detection and correction performance
Appendix E - DME operation in the presence of UAT signals
Appendix F - Example UAT ADS-B message encoding
Appendix G - Aircraft antennas
Appendix H - Simulated results for delivery of four trajectory
             change reports over UAT in Core Europe 2015
Appendix I - UAT ground station data channel assignment guidance
Appendix J - Future range validation of UAT messages
Appendix K - Requirements and desirable features for the universal
             access transceiver (UAT) system

The objective of Part I of this manual (in conjunction with the UAT SARPs of Annex 10, Volume III) is to define internationally agreed detailed technical specifications for the UAT system that accomplish the following: a) establish a basis for RF compatibility of UAT with other systems operating in the 960 MHz to 1 215 MHz frequency band (ACAS, DME, SSR, TACAN, JTIDS/MIDS and GNSS E5/L5); b) establish a common basis for UAT inter-system interoperability across implementations manufactured and certified in different regions of the world.