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2 . ELT coding . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attachment A to Part X .Gui dance material for aeronautical mobile-satellite service ..............
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Levels of capability . . . . . . . . . . . . . . . . .
2 . Broadband RF characteristics . . . . . . . . . . . . . . .
2.1 Use of AMS(R)S bands . . . . . . . . . . . . . .
2.2 Frequency accuracy and compensation . . . .
2.3 Aircraft earth station antenna characteristics
2.4 Receiver requirements . . . . . . . . . . . . . . . .
2.5 Transmitter requirements . . . . . . . . . . . . . .
2.6 Interference . . . . . . . . . . . . . . . . . . . . . . .
3 . RF channel characteristics . . . . . . . . . . . . . . . . .
3.1 Modulation characteristics . . . . . . . . . . . . .
3.2 Bounds on radiated power
spectral density . . . . . . . . . . . . . . . . . . . .
3.3 Demodulator performance . . . . . . . . . . . . .
3.4 Acquisition delay . . . . . . . . . . . . . . . . . . .
4 . Channel format types and data rates . . . . . . . . . .
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 P channel . . . . . . . . . . . . . . . . . . . . . . . .
4.3 R channel . . . . . . . . . . . . . . . . . . . . . . . .
4.4 T channel . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 C channel . . . . . . . . . . . . . . . . . . . . . . . .
5 . Link layer P channel and R channel protocols . . .
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 SU set generation . . . . . . . . . . . . . . . . . . .
5.3 SUs transmission according to precedence . .
5.4 P channel protocol . . . . . . . . . . . . . . . . . .
5.5 R channel protocol . . . . . . . . . . . . . . . . . .
6 . Link layer T channel and sub-band
C channel protocols . . . . . . . . . . . . . . . . . . . . .
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 SU set generation . . . . . . . . . . . . . . . . . . .
6.3 T channel transmission protocol . . . . . . . . .
6.4 T channel reservation protocol . . . . . . . . . .
6.5 Sub-band C channel to-aircraft and
from-aircraft protocol . . . . . . . . . . . . . . . .
7 . Satellite subnetwork layer . . . . . . . . . . . . . . . . .
7.1 General provisions . . . . . . . . . . . . . . . . . .
7.2 Packet data pcrfonnalce . . . . . . . . . . . . . .
7.3 Satellite subnetwork dependent protocol
services and operations . . . . . . . . . . . . . . .

Foreword Annex 10 - Aeronautical Telecommunications
Table A. Amendments to Annex 10, Volume I11
Adopted
Effective
Amendment Source(s) Subjectis) Applicable
70 Air Navigation Commission, Introduction of new Volume 111 and SARPs related to the Aeronautical 20 March 1995
Third Meeting of the Aerc- Mobile-Satellite Service (AMSS) 24 July 1995
nautical Mobile Communications 9 November 1995
Panel (AMCP)
71 Air Navigation Commission; SP Addition of specifications for the Mode S subnetwork of ATN; 12 March 1996
COM/OPS/95 Divisional Meeting addition of material relating to the introduction of 8.33 kHz channel 15 July 1996
(1995): fifth meeting of the spacing; changes to material related to the protection of air-ground 7 November 1996
Secondaty Surveillance Radar communications in the VHF band; addition of technical specifications
Improvements and Collision relating to the RF characteristics for the VHF digital link (VDL).
Avoidance Systems Panel
(SICASP); third meeting of the
Aeronautical Mobile
Communications Panel (AMCP)
72 Air Navigation Cotlmission; Introduction of SARPs and guidance material for VI-IF digital link 12 March 1997
fourth meeting of the (VDL); definition for VDL and deletion of obsolete material on 21. July 1997
Aeronautical Mobile airlground data interchange. 6 November 1997
Communications Panel (AMCP)
73 Air Navigation Commission; Introduction of material relating to the ATN; changes to specifications 19 March 1998
second meeting of the of the Mode S subnetwork. 20 July 1998
Aeronautical Telecommunicaxion 5 November 1998
Network Panel (ATNP); sixth
meeting of the Secondary
Surveillance Radar Improvements
and Collision Avoidance Systems
Panel (SICASP)
511 1/98
Nu. 73
CHAPTER 2. GENERAL
[to be developed]
ANNEX 10 - VOLUME 111
CHAPTER 3. AERONAUTICAL
TELECOMMUNICATIONS NETWORK
3.1 DEFINITIONS
Note.-- The following definitions were takenfrom ISO/IEC
7498-1, Information technology - Open Systems Interconnection
- Basic Reference Model (Reference: ITU-T Rec. X.200
(1994)) and from ICAO Doc 9705 - Manual of Technical
　
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