準天頂衛星測位システムのシステム設計

摘要

Quasi-Zenith Satellite Navigation System (QZSS) is a constellation consisted of several satellites in elliptical andinclined orbits in different orbital planes. QZSS is designed that at least one Quasi-Zenith Navigation Satellite (QZS)out of several satellites always exists near the zenith over Japan. Japan Aerospace Exploration Agency (JAXA) has beenresearched and developed navigation system of QZSS with other national research institutes. At March 31, 2006,government of Japan decided to promote the QZSS program as single mission at least 1st satellite, i. e, navigationmission only. At the same time, GOJ also decided that JAXA is to develop the 1st satellite bus system and groundtracking and control stations. In this paper, we describe the overview of the QZSS system design.