OSCAR 1, first orbital amateur radio satellite launched

On December 12, 1961, the first orbital amateur radio satellite, OSCAR 1 (Orbital Satellite Carrying Amateur Radio), was launched. Developed by Project OSCAR, a group of California-based radio amateurs, the satellite was carried into orbit as a secondary payload aboard a Thor-Agena rocket. OSCAR 1 transmitted a simple beacon signal on the 144 MHz amateur radio band, which could be received by amateur radio operators around the world. This landmark achievement demonstrated the potential for amateur satellites, leading to the establishment of the Amateur Radio Satellite Corporation (AMSAT). OSCAR 1’s success paved the way for numerous subsequent amateur radio satellites, greatly enhancing the capabilities and reach of the amateur radio community.