The International Amateur Radio Union (IARU) is a federation of national associations of certified radio amateurs, representing over 150 countries and separate territories around the world.

The three IARU Regions are organised to broadly mirror the structure of the International Telecommunications Union (ITU) and its related regional telecommunications organisations. The Regions comprise:
- IARU Region 1: Europe, Africa, the Middle East and Northern Asia
- IARU Region 2: The Americas
- IARU Region 3: Asia-Pacific

The IARU represents the interests of the Amateur Radio Service worldwide to relevant international organisations, promoting the interests of amateur radio and seeking to protect and enhance its spectrum privileges.

Amateur Radio Satellite Frequency Coordination

Information for developers of satellites planned to use frequency bands allocated to the amateur satellite service
(IARU-R1) 26 January 2003

Careful and detailed mission planning — particularly radio frequency planning — gives satellite projects the best chances of success. Working out space station and Earth station operating frequencies and link operating parameters at the very beginning of the design process means:

Communication links will work because the link budget is planned to be adequate for the mission

Antenna gain, physical size(s), placement(s), and pointing accuracy (if needed) will be adequate for the mission

Transmitter power requirements, emission, and coding types will be selected for efficiency and performance

Receiver design will be selected for sensitivity, bandwidth, and susceptibility to interference so that it will perform adequately for the mission

Space station power generation and storage will be adequate for the mission

The Advisory Panel supporting the IARU Amateur Satellite Advisor has developed a comprehensive guide for groups planning and building satellites that will operate on Amateur frequencies.

See also frequency coordination requests