Coordinated Universal Time (UTC) Coordinated Universal Time (UTC): Time scale, based on the second (SI), as defined and recommended by the CCIR, and maintained by the Bureau International des Poids et Mesures (BIPM). For most practical purposes associated with the Radio Regulations, UTC is equivalent to mean solar time at the prime meridian (0 longitude), formerly expressed in GMT. Note 1: The ...

UTC/GMT Conversion Home Up Front Newsroom Editorial E-Letters Features Glenn Hauser's SW/DX Report Glenn Hauser's Continent of Media Don Schimmel's Radio Intrigue Joe Carr's Tech Notes Radio Basics Frequency vs. Wavelength Modes and Modulation Call Sign Prefixes UTC/GMT Conversion Radio Terms Shortwave Radio Introduction to Shortwave Listening Tuning 150 kHz to 30 MHz Selecting a Shortwave Radio ...