In order to increase an air traffic capacity in oceanic areas, the introduction of a new surveillance system which enables reduced separations is needed. Automatic Dependent Surveillance (ADS) is a system whereby aircraft automatically transmit, via a data link, data derived from on board navigation system. The ICAO/FANS committee recommended its early development and implementation in the scenario of CNS (Communications, Navigation and Surveillance) required for Air Traffic Services (ATS) for the next two decades. Currently, the ADS panel of ICAO is working out the Standard and Recommended Practices (SARPs) for ADS.
We carried out the ADS Pacific Engineering Trial (ADS/PET) for evaluation of ADS, a trilateral cooperative program by Australia, USA and Japan. In case of Japan, the ADS data are sent from the aircraft to the Ground Earth Station (GES) via INMARSAT satellite in the pacific ocean region or indian ocean region and relayed to the ENRI (Electronic Navigation Research Institute) through the data link computer at AVICOM JAPAN. Those data are processed, displayed and stored by ADS Data Processing & Display System. The trials were carried out using a JAL's (Japan Air line's) B747-400 aircraft from May 1991 to March 1993. This paper describes the concept of ADS PET program, and development of the ADS Data Processing & Display System.
