HLA (radio station)

Time signal transmitter in South Korea

36°23′15″N 127°21′59″E﻿ / ﻿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

[edit]

1. ^ a b c 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, archived from the original on 2012-11-06, 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)
4. ^ National Geospatial-Intelligence Agency (2005), PUB 117: Radio Navigation Aids, pp. 2–17, retrieved 2011-08-25

## External links

[edit]

* HLA (in Korean)This link is no longer valid.
* KRISS time and frequency dissemination (in English)This link is no longer valid.

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Time signal stations

Longwave|

* BPC
* BPL
* BSF
* Beta
* DCF77
* JJY
* RBU
* RTZ
* TDF time signal
* Time from NPL
* WWVB

Shortwave|

* BPM
* CHU
* HD2IOA
* HLA
* JN53DV
* ROA Time
* RWM
* WWV
* WWVH
* YVTO

VHF/FM/UHF|

* Radio Data System

Satellite|

* BeiDou
* DORIS
* GLONASS
* Galileo
* Global Positioning System
* IRNSS
* Quasi-Zenith Satellite System

Defunct|

* BSF
* HBG
* NAA
* OLB5
* OMA
* Radio VNG
* WWVL
* Y3S

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Time signal authorities

|  ANFR|  KRISS|  MIKES|  NICT|  NIST|  NPL|  NRC|  NTSC|  PTB|  ROA|  SHN|  VNIIFTRI| Other

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* ALS162

* HLA

* MIKES

* JJY

* WWVB
* WWV
* WWVH

* MSF
* BBC (198 kHz)

* CHU

* BPC
* BPL
* BPM

* DCF77
* DCF (EFR)

* EBC

* LOL

* RBU
* RJH (Beta)
* RNS (CHAYKA)
* RTZ
* RWM

* BSF
* HD2IOA
* JN53DV
* PPE
* YVTO

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