AMSAT-OSCAR 7

AMSAT-OSCAR 7

AMSAT-OSCAR 7, an amateur radio satellite which was launched in 1974 was thought to have failed in 1981, but it remained intermittently functional. It allowed Polish anti-communist activists to safely and clandestinely communicate when martial law was imposed in 1983. The telephone network had been shuttered, and other communication methods were too easily discovered.

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