Abstract
The first Japanese deepspace probes called Sakigake and Suisei were launched from Uchinoura Launching Site, located at 1,500 km south-west of Tokyo, respectively on January 8 and August 19, 1985. The Institute of Space and Astronautical Science has developed the new four-stage solid propellant boosters called M3S-II for this purpose and constructed a gigantic antenna - 64 m in diameter - in Usuda, located at 150 km north-west of Tokyo. These probes successfully encounted Halley’s comet in March, 1986. In this paper, the guidance and navigation problems, namely the guidance of the last stage rocket in the direct ascent scheme, the midcourse maneuvers and the tracking and navigation of the probes throughout the mission, will be discussed.
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