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Time of arrival (TOA or ToA) is the absolute time instant when a radio signal emanating from a transmitter reaches a remote receiver. The time span elapsed since the time of transmission (TOT or ToT) is the time of flight (TOF or ToF). Time difference of arrival (TDOA) is the difference between TOAs.
The FCC "History Cards" were collections of 5-by-8-inch (13 by 20 cm) index cards, maintained for each AM, FM and TV broadcasting station. They were introduced in early 1927, at the time of the establishment of the Federal Radio Commission (FRC), and were taken over by the Federal Communications Commission (FCC) after its formation in 1934.
One of these stations, called the "secondary" is also equipped with a radio receiver. When this receiver hears the signal from the other station, referred to as the "primary", it triggers its own broadcast. The primary station can then broadcast any series of pulses, with the secondary hearing these and generating the same series after a 1 ms ...
In Australia, many information-based radio stations broadcast time signals at the beginning of the hour, and a speaking clock service was also available until October 2019. However, the VNG dedicated time signal service has been discontinued. [18] In Cuba, Radio Reloj is a radio station which has a time signal over news. Radio Reloj translates ...
PHOHI was aimed at Dutch colonies in the East and West Indies, PCJJ was an international station broadcasting in English, Spanish, German and Dutch. Service suspended in 1940 due to World War II, resumed in 1945 until 1947 when the stations were nationalized and became Radio Netherlands.
A radionavigation mobile station is – according to article 1.87 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [17] – defined as "A radio station in the radionavigation service intended to be used while in motion or during halts at unspecified points."
The angle of arrival (AOA) at a receiving station can be determined by the use of a directional antenna, or by differential time of arrival at an array of antennas with known location. AOA information may be combined with distance estimates from the techniques previously described to establish the location of a transmitter or backscatterer.
Between 31 and 39 seconds past the minute inclusive, the once-per-second tones are reduced to 10-millisecond "ticks" while a digital time code is transmitted. The digital time code is formatted so that a Bell 103-compatible 300-baud modem can decode it, [5] and CHU is the only time signal station that uses this format for its time code ...