GPSソーラーウオッチの開発(技術報告)

抄録

SEIKO ASTRON is the first solar GPS watch in the world that can quickly indicate the local time of the place where one stays, getting information, anywhere in the world. In this watch, we reduced drastically electricity consumption mainly by using a high accuracy small GPS module which has enabled to lower electricity consumption up to about 1/5 of traditional module. While remaining compatible with a metal case, this watch can quickly indicate the time where it is located. This achievement has been realized through the development of a highly sensitive receiving system that picks up weak signals from satellites, and also by developing an algorithm that determines by signal the time zone of the place where one is located.