HLA_(radio_station)

HLA (radio station)

HLA (radio station)

Time signal transmitter in South Korea


36.38753°N 127.36650°E / 36.38753; 127.36650 (HLA time signal antenna) HLA is a time signal radio station in Daejeon, South Korea, operated by the Korea Research Institute of Standards and Science. Established on November 24, 1984, it transmits a 2 kW signal on 5 MHz (±0.01 Hz[1]). Originally only transmitted for 7 hours per day (01:00–08:00), 5 days per week (M–F),[2] it is continuous as of 2011.[1] There are over 100 users of the signal in Korea.[3]

It broadcasts a time signal similar to that of the WWV and WWVH stations with which it shares a frequency:[1][4]

  • Second pulses are 5 ms (9 cycles) of 1.8 kHz, 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 1.5 kHz
  • 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

  1. BIPM (2011-06-20), Time Signals (PDF), retrieved 2011-08-25
  2. International Telecommunication Union (6 October 2010), Characteristics of standard-frequency and time-signal emissions in allocated bands and characteristics of stations emitting with regular schedules with stabilized frequencies, outside of allocated bands, retrieved 2011-08-25 Supplement to Recommendation ITU-R TF.768 “Standard frequencies and time signals”.
  3. List of HLA users Archived 2012-03-04 at the Wayback Machine (in Korean)



Share this article:

This article uses material from the Wikipedia article HLA_(radio_station), and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.