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1978

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Navstar 1, the first GPS satellite launched 1978, took off on Feb 22, 1978. This friendly piece explains the Block I tests, atomic clocks, and how that small launch grew into the GPS system we rely on today. 儿童科学

Navstar 1：1978年发射的首颗GPS卫星

Navstar 1是1978年发射的首颗…

Alexandra Hochee

Alexandra Hochee

20 6 月, 2026 •
1 分钟阅读

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