Abstract: Over the last decade, the research and development of a fiber optic gyroscope (FOG) has made remarkable progress, and it is now recognized that this new technology will take the place of a traditional gyroscope during the 1990s. In fact, the flight test of this FOG was performed on February 22, 1990, aboard an S-520-11 rocket at ISAS's test facilities in Uchinoura, Japan. The flight test was successfully demonstrated. During the mission, the FOG rate sensor worked well and the expected performance of the FOG rate sensor was confirmed. This was the first experience for a rocket use of the FOG. This paper reviews the outlook of FOG during the 1990s based on the present status of FOG R&D.
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