資料A-1
ION GPS - 99 発表論文
The First Prototype
GPS/WAAS Receiver in Japan
Hiroyuki Nakao, Masato Kawai, Kazuyoshi Wakasa, Masaya Izumikawa
Furuno Electric Co., Ltd.
BIOGRAPHIES
Hiroyuki Nakao is a Senior Software Engineer. He graduated Computer Nihon Gakuin College in 1984. He has over 13 years of experience in the field of GPS receiver software. Currently he is working on a development of the software for the product version of GPS/WAAS receiver.
Masato Kawai is also a Senior Software Engineer. He received BS in Information Engineering at the Nagoya Institute of Technology in Japan. He has over 12 years experience in the field of embedded software development. He is currently involved in development of the software for the product version of GPS/WAAS receiver.
Kazuyoshi Wakasa is a Senior Design Engineer. He received his BS in Electronics at the University of Kobe in Japan. He has over 14 years experience in the field of the development of the navigation system in aviation. He currently working on development of the product version of GPS/WAAS receiver.
Masaya Izumikawa is a Software Engineer. He graduated OGIS Computer College in 1992. He has over 5 years experience in the field of GPS navigation system and moving map display system in avionics.
ABSTRACT
This paper presents an overview of the software of our prototype GPS/WAAS Receiver. It covers the following topics:
◆ Specifications;
◆ Hardware structure;
◆ Software structure;
◆ Classification and selection of position-fixing methods;
◆ Handling multiple SBAS satellites;
◆ FD/FDE processing;
◆ Brief future plan for experiments;
◆ Result of receiving experiment as an annex.
1. INTRODUCTION
Preparation of GPS augmentation systems using geostationary satellites, such as Wide Area Augmentation System (WAAS) in the United States and European Geostationary Navigation Overlay Service (EGNOS) in Europe are in progress as a position fixing system for civil aircraft. In Japan, Multi-functional Transport Satellite (MTSAT) is scheduled to be launched on September 12, 1999 and will be used for the purpose of MTSAT Satellite based Augmentation System (MSAS).
Taking the above circumstances into our consideration, we have developed a prototype of GPS/WAAS Receiver as a contract research with the subsidy of The Nippon Foundation and Japan Civil Aviation Promotion Foundation, supported by Japan Civil Aviation Bureau (JCAB) and Electronic Navigation Research Institute (ENRI). The prototype is designed in accordance with the latest MOPS (RTCA/DO-229A) in success and is believed to be the first Receiver which has been developed in Japan. We would like to introduce our Receiver focusing on the viewpoint of the software.
