Setting the time according to the time information carried or implied by the radio signal

GPS Global Positioning System Call sign in broadcasting or radio communications, designates a transmitting station. A call sign can be formally assigned by a government agency or informally adopted by individuals or organizations DCF77 designates the call sign broadcast from Mainflingen, about 25 km south-east of Frankfurt am Main, Germany. The call signDCF77 stands for D=Deutschland (Germany), C=long wave signal, F=Frankfurt, 77=frequency: 77.5 kHz JJY40 JJY60 designates the call sign broadcast from Mount Otakadoya (in Fukushima prefecture, Japan) at 40 kHz and from Mount Hagane (in Saga prefecture, Japan) at 60 kHz MSF60 designates the call sign broadcast from Anthorn (UK) at 60 kHz with a range up to 1500 km, which covers all of UK WWVB designates the call sign of the United States National Institute of Standards and Technology's (NIST) radio station in Fort Collins, Colorado, that transmits carrier and time code (no voice) on 60 kHz (low frequency [LF] band), and which is used for synchronising radio-controlled clocks throughout the North America GSM Global System for Mobile communications, originally from the French Groupe Spécial Mobile AM/FM Amplitude Modulation / Frequency Modulation UMTS Universal Mobile Telecommunications System 3G International Mobile Telecommunications-2000 (IMT-2000), better known as 3G or 3rd Generation RDS Radio Data System