HLA is a

time signal A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Church bells or voices announcing hours of prayer gave way to automatically operated chimes on public clocks; however, a ...

radio station Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radi ...

Daejeon Daejeon () is South Korea's fifth-largest metropolis, with a population of 1.5 million as of 2019. Located in the central-west region of South Korea alongside forested hills and the Geum River, the city is known both for its technology an ...

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eas ...

, operated by the

Korea Research Institute of Standards and Science The Korea Research Institute of Standards and Science (KRISS) is the national measurement standards laboratory for the Republic of Korea. It is a government-funded institute responsible for providing national measurement standards and advancing m ...

. Established on November 24, 1984, it transmits a 2 kW signal on 5 MHz (±0.01 Hz). Originally only transmitted for 7 hours per day (01:00–08:00), 5 days per week (M–F), it is continuous as of 2011. There are over 100 users of the signal in Korea. It broadcasts a time signal similar to that of the WWV and

WWVH WWVH is the callsign of the U.S. National Institute of Standards and Technology's shortwave radio time signal station located at the Barking Sands Missile Range, in Kekaha, on the island of Kauai in the state of Hawaii. WWVH is the Pacific si ...

stations with which it shares a frequency: * Second pulses are 5 ms (9 cycles) of 1800 Hz, beginning on the second * Seconds 29 and 59 are omitted * Minute markers are 800 ms of the same frequency * Hour markers are 800 ms of 1500 Hz * DUT1 is encoded using doubled pulses * Voice time announcements are made after second 52 * A time code is transmitted on a 100 Hz subcarrier

References

External links

HLA
This link is no longer valid.
KRISS time and frequency dissemination
This link is no longer valid. Radio stations in South Korea Mass media in Daejeon {{Asia-radio-station-stub