Amateur radio, also known as ham radio, is a popular hobby that involves using designated radio frequencies for non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.

Enthusiasts, known as “hams,” use various types of radio equipment to communicate with each other across town, around the world, and even into space without relying on the internet or cellular networks. The activity is regulated by national governments, and operators must pass an examination to be licensed, ensuring they understand the technical aspects and rules of radio communication.

Hams can also use satellites: these satellites, known as amateur radio satellites or “OSCARs” (Orbiting Satellite Carrying Amateur Radio), are specifically designed for use by licensed amateur radio operators. They facilitate long-distance communication by receiving signals from an amateur radio station on the ground and retransmitting them back to earth. This allows operators to communicate over vast distances, beyond the line-of-sight limitations of terrestrial radio.

ARISS, which stands for Amateur Radio on the International Space Station, is a program that allows students and amateur radio operators to communicate with astronauts aboard the International Space Station (ISS) using amateur radio equipment.

On hamradio​.org, you will find additional information about:

• The history of the hobby,
• The various associations that contribute to organizing the hobby,
• How the radio spectrum is organized and regulated.