ITU-R Radio Regulations Board (RRB)

ITU-R Working Party 5D (WP 5D) - IMT Systems

ITU-R Meeting of Study Group 3 - Radiowave Propagation

ITU-R Coordination Committee for Vocabulary (CCV)

ITU-R Working Party 3L (WP 3L) - Ionospheric propagation and radio noise

ITU-R Working Party 3M (WP 3M) - Point-to-point and Earth-space propagation

ITU-R Working Party 3K (WP 3K) - Point-to-area propagation

ITU-R Working Party 3J (WP 3J) - Propagation fundamentals

ITU-R Working Party 5C (WP 5C) - Fixed wireless systems; HF systems in the fixed and land mobile services

ITU-R Working Party 5A (WP 5A) - Land mobile service excluding IMT; amateur and amateur-satellite service