International Civil Aviation Organization

World-wide CNS/ATM Systems

Implementation Conference

Rio de Janeiro, 11 – 15 May 1998

WW/IMP–WP/33

11/5/98

Item 4.3

Agenda Item4:	Technical Co-operation Challenges

4.3	Technical Co-operation Projects

CNS/ATM and Traditional Technologies Integration Programme

(Presented by the Air Navigation Service of Latvia)

Action Paper

SUMMARY

The present document contains some suggestions on co-operation in the field of integration of conventional and CNS/ATM technologies for Air Traffic Management and Air Traffic Control.

We suggest our programme on integration of CNS/ATM and current technologies for international consideration. In case of interest, we would like kindly to invite all interested Parties to co-operate in the programme in order to attain mutual benefits.

1.	Air Navigation Services should provide Air Traffic Management and Air Traffic Control for differently equipped aircraft (from conventional VHF voice radio up to FANS-1 and VDL4 ) in order to ensure seamless environment. Under these conditions it is necessary to design and develop universal controller workstations to integrate and display data from different sensors (from PSR, SSR, multi-radar tracking up to SSR Mode-S, multi- sensor tracking and various kinds of ADS.) Furthermore, it is necessary to combine voice and data link communication and harmonize different solutions that form or might form future CNS/ATM environment.

1.2	At the moment there is simultaneous use of conventional systems for air communication, navigation and surveillance as well as prospective systems, that can be used for CNS/ATM concept implementation, among them:

Conventional: voice communication, VOR/DME beacons, PSR and SSR, etc.

ACARS is a well-known and widely used system (right now approximately 5000 aircraft all over the world are equipped with the system).

STDMA (Self-Organizing Time Division Multiple Access) technology. This project is supported by EUROCONTROL and Swedish CAA. Also STDMA is known as VDL4 (mode of VHF data link) and considered by ICAO as the possible future data link mode in CNS/ATM Concept. It is not certified by ICAO yet. Right now STDMA is used in Sweden and some other European countries (initial phase).

SSR Mode-S. The system is widely used in the USA; however, there are Mode-S projects in Europe.

Some navigation applications based on VDL 3 technology.

1.3	In such multi-modal environment, Air Navigation Service of Latvia should provide an adequate service to all airspace users regardless to avionics onboard in order to ensure seamless environment.

1.4	Air Navigation Service of Latvia is situated between Western Europe, where the above-mentioned systems and means are already used to certain extent, and other ex-USSR countries where the situation is undefined. That is why Air Navigation Service of Latvia, being in technological and technical interface, is interested in design and development of a universal system to integrate current and future technologies.

1.5	It is necessary to have at first a homogeneous and friendly environment for the controller and then an ability to interact with all possible systems, that will become a part of the future ATM infrastructure.

1.6	Design and development of the system is especially important within the transition period while all the above-mentioned systems, technologies and standards are used.

1.7	From our point of view there are a number of complex issues to be resolved, namely:

fusion of situational data provided by different sensors and multi-radar tracking system;

development of procedures for air traffic control on the base of multi-sensor data and data link communication environment;

elaboration of requirements to the situational HMI ;

development of CPDLC interface or evaluation of existing CPDLC interfaces;

optimal frequency spectrum management for different users as well as for voice and data links;

integration of other CNS/ATM applications for example digital ATIS and others into multi-standard environment.

1.8	To meet the coming requirements and changes Air Navigation Service of Latvia undertook some steps and experimental work on integration of traditional means (multi-radar tracking) with ADS-C (on the basis of ACARS) and ADS-B which is based on STDMA technology. The programme envisages:

Design of CNS/ATM Training Course for Air Traffic Controllers in the frame of ICAO Training Programme.

Deployment of VHF data link ground station operating with ACARS system to provide ADS and CPDLC functionalities and access to the global network.

Installation of VDL 4 (STDMA) ground station and transponders on some vehicles and aircraft to organize ADS-B trials.

Latvian ADS-B chain connection to the North European ADS-B Network ( NEAN ).

Multi-sensor tracking including multi-radar tracking and ADS data.

1.9	As a result, a model of seamless and unified environment will be created, integration of various ADS and radar data will be done and a definite experience in network, technologies and standards co-operations will be worked out.

Recommended Actions:

Consider on the international basis Latvian ANS Programme.

Design recommendations for transition period on integration of conventional and CNS/ATM systems to make seamless and homogeneous/friendly environment for air space users and air traffic controllers.