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BPL (time service)

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Time signal radio station in China

BPL is the call sign of the official long-wavetime signal service of thePeople's Republic of China, operated by theChinese Academy of Sciences, broadcasting on 100 kHz from CAS'sNational Time Service Center^[1] inPucheng County, Shaanxi at34°56′54″N109°32′34″E / 34.94833°N 109.54278°E /34.94833; 109.54278,^[2] roughly 70 km northeast ofLintong,^[3] along with NTSC's short-wave time signalBPM on 2.5, 5.0, 10.0, and 15.0MHz.

BPL broadcastsLORAN-C compatible format signal from 5:30 to 13:30 UTC,^[4] using an 800 kW transmitter covering a radius up to 3,000 km.^[5]

^National Time Service Center
^Time Signals(PDF), BIPM, p. 78, archived fromthe original(PDF) on 2021-10-10, retrieved2011-04-20
^"Facilities - National Time Service Center (NTSC), Chinese Academy of Sciences".
^"长波授时 (Longwave time signal)".National Time Service Center, Chinese Academy of Sciences. Archived fromthe original on 10 January 2013. Retrieved16 March 2013.
^"科研成果 (Research achievements)".National Time Service Center, Chinese Academy of Sciences. Retrieved16 March 2013.

长波授时 (Longwave time signal), from the National Time Service Center, Chinese Academy of Sciences

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

Time signal authorities

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

Key concepts

Chronometry	UTC Universal Time TAI Unit of time Orders of magnitude (time)
Measurement systems	Italian six-hour clock Thai six-hour clock 12-hour clock 24-hour clock Relative hour Daylight saving time Chinese Decimal Hexadecimal Hindu Jain Metric Roman Sidereal Solar Time zone
Calendars	Main types Solar Lunar Lunisolar Gregorian Julian Hebrew Islamic Solar Hijri Chinese Hindu Panchang Maya List
Clocks	Main types astronomical astrarium atomic quantum hourglass marine sundial watch 24-hour wristwatch mechanical stopwatch water-based Cuckoo clock Digital clock Grandfather clock History Timeline

Geology	Geological time age chron eon epoch era period Geochronology Geological history of Earth
Physics	Absolute space and time Arrow of time Chronon Coordinate time Instant Proper time Spacetime Theory of relativity Time domain Time translation symmetry Time reversal symmetry
Other fields	Chronological dating Chronobiology Circadian rhythms Clock reaction Glottochronology Time geography

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