AMSAT-OSCAR 7

AO-7 (aka AMSAT-OSCAR 7) is the second Phase 2 amateur radio satellite constructed by AMSAT-NA, and it was launched into Low Earth Orbit on November 15, 1974. It remained operational until a battery failure in 1981. Then after 21 years of silence, the satellite was heard again on June 21, 2002 — 27 years after launch.

AMSAT-OSCAR 7

AO-7 (aka AMSAT-OSCAR 7) is the second Phase 2 amateur radio satellite constructed by AMSAT-NA, and it was launched into Low Earth Orbit on November 15, 1974. It remained operational until a battery failure in 1981. Then after 21 years of silence, the satellite was heard again on June 21, 2002 — 27 years after launch.