HLA (radio station): Difference between revisions

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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]

^ ^a ^b ^c BIPM (2011-06-20), Time Signals (PDF), retrieved 2011-08-25
^ 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”.
^ List of HLA users Archived 2012-03-04 at the Wayback Machine (in Korean)
^ 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HLA (in Korean)This link is no longer valid.
KRISS time and frequency dissemination (in English)This link is no longer valid.

This South Korea-related article is a stub. You can help Wikipedia by expanding it.

This article about a radio station in Asia is a stub. You can help Wikipedia by expanding it.

[timesignals-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, 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

[1]

[2]

[3]

[4]

@@ Line 1: / Line 1: @@
+{{Short description|Time signal transmitter in South Korea}}
 {{Coord|36.38753|N|127.36650|E|region:KR-30_type:landmark_dim:100|display=title|name=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&nbsp;kW signal on 5&nbsp;MHz (±0.01&nbsp;Hz<ref name="timesignals"/>).  Originally only transmitted for 7 hours per day (01:00–08:00), 5 days per week (M–F),<ref>{{Citation |url=http://www.itu.int/dms_pub/itu-r/oth/0A/08/R0A080000070001MSWE.doc |author=International Telecommunication Union |date=6 October 2010 |title=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 |accessdate=2011-08-25}}  Supplement to Recommendation ITU-R TF.768 “Standard frequencies and time signals”.</ref> it is continuous as of 2011.<ref name="timesignals">{{Citation |url=ftp://ftp2.bipm.org/pub/tai/scale/timesignals.pdf |title=Time Signals |date=2011-06-20 |author=BIPM |authorlink=International Bureau of Weights and Measures |accessdate=2011-08-25}}</ref>  There are over 100 users of the signal in Korea.<ref>[http://www.kriss.re.kr/time/research/service/hla_user.jsp List of HLA users] {{ko icon}}</ref>
+'''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&nbsp;kW signal on 5&nbsp;MHz (±0.01&nbsp;Hz<ref name="timesignals"/>).  Originally only transmitted for 7 hours per day (01:00–08:00), 5 days per week (M–F),<ref>{{Citation |url=http://www.itu.int/dms_pub/itu-r/oth/0A/08/R0A080000070001MSWE.doc |author=International Telecommunication Union |date=6 October 2010 |title=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 |accessdate=2011-08-25 |archive-date=2012-11-06 |archive-url=https://web.archive.org/web/20121106155527/http://www.itu.int/dms_pub/itu-r/oth/0A/08/R0A080000070001MSWE.doc |url-status=dead }}  Supplement to Recommendation ITU-R TF.768 “Standard frequencies and time signals”.</ref> it is continuous as of 2011.<ref name="timesignals">{{Citation |url=ftp://ftp2.bipm.org/pub/tai/scale/TIMESIGNALS/timesignals.pdf |title=Time Signals |date=2011-06-20 |author=BIPM |authorlink=International Bureau of Weights and Measures |accessdate=2011-08-25}}</ref>  There are over 100 users of the signal in Korea.<ref>[http://www.kriss.re.kr/time/research/service/hla_user.jsp List of HLA users] {{Webarchive|url=https://web.archive.org/web/20120304055754/http://www.kriss.re.kr/time/research/service/hla_user.jsp |date=2012-03-04 }} {{in lang|ko}}</ref>
 It broadcasts a time signal similar to that of the [[WWV (radio station)|WWV]] and [[WWVH]] stations with which it shares a frequency:<ref name="timesignals"/><ref>{{Citation |title=PUB 117: Radio Navigation Aids |author=National Geospatial-Intelligence Agency |authorlink=National Geospatial-Intelligence Agency |url=http://msi.nga.mil/NGAPortal/MSI.portal?_nfpb=true&_pageLabel=msi_portal_page_62&pubCode=0009 |year=2005 |pages=2–17 |accessdate=2011-08-25}}</ref>
-* Second pulses are 5 ms (9 cycles) of 1800&nbsp;Hz, beginning on the second
+* Second pulses are 5 ms (9 cycles) of 1.8&nbsp;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 1500&nbsp;Hz
+* Hour markers are 800 ms of 1.5&nbsp;kHz
 * [[DUT1]] is encoded using doubled pulses
 * Voice time announcements are made after second 52
@@ Line 15: / Line 16: @@
 ==External links==
-*[http://www.kriss.re.kr/time/research/service/hla.jsp HLA] {{ko icon}}This link is no longer valid.
+*[https://web.archive.org/web/20071014005934/http://www.kriss.re.kr/time/research/service/hla.jsp HLA] {{in lang|ko}}This link is no longer valid.
-*[http://www.kriss.re.kr/time/english/fields/intro.jsp KRISS time and frequency dissemination] {{en icon}}This link is no longer valid.
+*[https://web.archive.org/web/20120324224351/http://www.kriss.re.kr/time/english/fields/intro.jsp KRISS time and frequency dissemination] {{in lang|en}}This link is no longer valid.
+{{Time signal stations}}
-{{TimeSig}}
+{{Time signal authorities}}
+[[Category:Radio stations established in 1984]]
+[[Category:1984 establishments in South Korea]]
 [[Category:Radio stations in South Korea]]
-[[Category:Media in Daejeon]]
+[[Category:Mass media in Daejeon]]

v t e 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