CNS SG/20 – IP/08 Agenda Item 5.4 01/07/16

International Civil Aviation Organization

TWENTIETH MEETING OF THE COMMUNICATIONS/NAVIGATION AND SURVEILLANCE SUB-GROUP (CNS SG/20) OF APANPIRG

Bangkok, Thailand, 11 – 15 July 2016

Agenda Item 5: Navigation

5.4 Development on GBAS (e.g. IGWG)

GBAS IMPLEMENTATION PLAN IN JAPAN

(Presented by Japan)

SUMMARY

This paper presents the GBAS implementation plan in Japan. Japan Civil Aviation Bureau (JCAB) has roadmap, whose name is CARATS and which targets the renovation toward 2025. Based on the decision of the CARATS, JCAB will be implementing Category-I GBAS in Japanese airport. Then JCAB has decided that the first operational GBAS will implement to Tokyo international (Haneda) airport.

1. INTRODUCTION

GBAS development in Japan has so far been conducted at the Electronic Navigation Research Institute (ENRI).

The GBAS implementation to Japan has been studied in the scheme of CARATS of Japan based on direction of ICAO GANP which is also shown in its ASBU. As a result, the decision of GBAS implementation to Japan was made based on the following conditions.

- GBAS has been implemented in many countries in the world.

- Airborne GBAS equipage rate has been increasing. Boeing promotes to make it as the standard equipment for their airplanes, and the optional selections of this equipment is available to all Airbus airplanes.

- According to the business case study on CARATS, it showed that GBAS implementation is sufficiently cost-effective. Two kinds of benefits are considered in this study. It is beneficial in consideration of benefits as expected in the future and it is also cost effective when quoted even at this point of time.

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In 2015, JCAB made a decision to implement GBAS in Japan. This decision was done in the background of positive R&D activities on GBAS conducted by ENRI. This was done in consideration of worldwide implementation of GBAS, and also on the basis of business case study results.

RNP to GLS procedure is considered to be applied at the appropriate time after implementation of GBAS in Japan. This consideration is based on the fact that RNP to GLS operation is being currently discussed by ICAO and other organizations.

The GBAS test bed was installed at Sendai airport in 2002 by ENRI, and then in 2010 GAST-C GBAS prototype was installed at Kansai airport, and then in 2014, GAST-D GBAS prototype was installed at New Ishigaki airport, and research and development activities were conducted including verification of SARPs. GAST-C GBAS prototype was relocated from Kansai airport to New Chitose airport in 2015 and is being used now for evaluation by JCAB.

2. DISCUSSION

2.1 GBAS installation

The airport in the first stage for GBAS installation was studied considering the following requirements.

- Aircrafts being considered must be having regular flights in the airport concerned. (In Japan, only B-787 and B-747-8 type aircrafts are having GBAS aboard.)

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- The airport concerned must be capable of introducing GBAS based introduction system. (Presently, available procedure is “ILS look alike” only.).

- Sufficient benefits are to be expected by GBAS installation.

As a result of the above study, JCAB decided to install GBAS in Tokyo International (Haneda) airport as the first GBAS system implementing airport in Japan. Haneda airport is the largest airport in Japan having the maximum traffic volume with four (4) runways.

Since compatibility with Japanese ionospheric conditions is necessary for GBAS operation, its design has to be able to mitigate Japanese ionospheric threat, and Japanese certification is required for GBAS system. Japanese ionospheric threat model is defined under cooperation by ENRI.

GBAS implementation in Haneda airport is started from this year and the installation is to be complete by the end of March in 2019 (the end of Japanese Fiscal year of 2018). After the installation the evaluation operation will be conducted, then the start of CAT-I operation is planned before the end of March in 2021 (the end of Japanese Fiscal year of 2020).

2.2 GBAS deployment activity in Japan

JCAB promotes the study to implement CAT-I GBAS to major airports and CAT-III GBAS implementation to be done after the first GBAS installation is done in the Haneda airport.

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Regarding CAT-III GBAS implementation, it is considered necessary to assess the operational CAT-III GBAS development status and airborne GBAS equipage rate after updating of SARPs including CAT-III GBAS standards.

For the advancement of GBAS, Japan will support the cooperative efforts to complete developing the CAT-II/III GBAS SARPs for amendment in 2018.

3. ACTION BY THE MEETING

3.1 The meeting is invited to:

a) note the information contained in this paper; and

b) discuss any relevant matters as appropriate.

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