Receiving, identifying and decoding LF/HF radio time signals

Receiving, identifying and decoding time signals is an interesting and sometimes challenging aspect of amateur radio.
Time signals have unique spectral 'foot print' which makes them very special!

List of active time signal transmitters, received in Australia (except for MSF, TDF and BBC which were received and decoded in Europe):

IDLocationWebsite
JJY-40 Mount Ootakadoya, Japan JJY-40 Website
JJY-60Mount Hogane, JapanJJY-60 Website
MSFAnthorn, Cumbria, EnglandMSF Radio Time Signal
WWVBFort Collins, ColoradoNIST - WWVB Website
RBUMoscowRBU Wikipedia page
BPCShangqui City, Henan ProvinceNTSC - BPC Information
HGBPrangins, SwitzerlandUTS - HGB Information
DCF 77Mainflingen, GermanyDCF 77 Wikipedia Page
TDFAllouis, FranceTDF Website
BBCDroitwich, Worcestershire, EnglandDroitwich BBC Transmission Gallery
BPMPuchech County, ChinaNTSC - BPM Information
WWVFort Collins, ColoradoNIST - WWV Website
WWVHKekaha, Kauai, HawaiiNIST - WWVH Website
CHUOttawa, Ontario, CanadaNRC - CHU Website
HD2IOAGuayaquil, EcuadorHD2IOA Wikipedia Page
RWMMoscow, RussiaRWM Wikipedia Page
HLADaejeon, South KoreaKRISS - HLA Website
YVTOCaracas, VenezuelaYVTO Wikipedia page
PYTBrazil
----------------------------------
ID Frequency Location
Website
Snapshot
Decode
QSL
RJH7725 KHzGeneralniy Shtab Voenno-morskogo Flota RF (Russian Navy). St.Petersburg, Russia

Arkhangelsk, Russia
RJH77 Website Recording of RJH77
RAB9925 KHzGeneralniy Shtab Voenno-morskogo Flota RF (Russian Navy). St.Petersburg, Russia

Khabarovsk, Russia
RAB99 Website

RJH6325 KHzGeneralniy Shtab Voenno-morskogo Flota RF (Russian Navy). St.Petersburg, Russia

Krasnodar, Russia
RJH63 Website

RJH9025 KHzGeneralniy Shtab Voenno-morskogo Flota RF (Russian Navy). St.Petersburg, Russia

N.Novgorod, Russia
RJH90 Website Recording of RJH90 (1)

Recording of RJH90 (2)
RJH6625 KHzSukhoputnyy uzel svyazi Tikhookeanskogo flota VMF RF, Chaldybar, Kyrgyzstan ---

RJH6925 KHz43-y uzel svyazi Voenno-morskogo Flota RF, Vileyka, Belarus ---
Recording of RJH69 (1)

Recording of RJH69 (2)
JJY-4040 KHzNational Institute of Information and CommunicationsTechnology (NICT), Applied Electromagnetic Research Institute, Japan Standard Time Group, 4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Mount Ootakadoya, Japan
JJY-40 Website



More pictures
JJY-6060 KHzNational Institute of Information and CommunicationsTechnology (NICT), Applied Electromagnetic Research Institute, Japan Standard Time Group, 4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Mount Hagane, Japan
JJY-60 Website



More pictures
MSF60 KHzNational Physical Laboratory, Hampton Rd, Teddington, Middlesex, TW11 0LW, United Kingdom

Anthorn, Cumbria, England
MSF Website

QSL
WWVB60 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWVB Website

QSL
RBU66.6 KHzMain Metrological Center of the State Sevice for Time, Frequency and Earth rotation parameters determination (SSTF), National Research Institute for Physicotechnical and Radio Engineering Measurements (FSUE "VNIIFTRI"), Moscow Region, 141570 Mendeleevo, Russia RBU Wikipedia page

More pictures
Recording of RBU66 QSL
BPC68.5 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Shangqiu City, Henan Province
NTSC - BPC Information

QSL
HGB75 KHzPrangins, Switzerland UTS - HGB Information

QSL
DCF 7777.5 KHzPhysikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany

Mainflingen, Germany
DCF 77 Wikipedia Page

More pictures
TDF162 KHzLaboratoire national de metrologie et d'essais - Systeme de References Temps-Espace (LINE-SYRTE), 61 avenue de I'Observatoire, 75014 Paris France

Allouis, France
TDF Website

QSL
BBC198 KHzNational Physical Laboratory, Hampton Rd, Teddington, Middlesex, TW11 0LW, United Kingdom

Droitwich, Worcestershire, England
Droitwich BBC Transmission Gallery

QSL
None198 KHzNational Physical Laboratory, Hampton Rd, Teddington, Middlesex, TW11 0LW, United Kingdom

Droitwich/Burghead/Westerglen, United Kingdom
---

QSL
BPM2500 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Lintong, China
BPM Website

QSL
BPM2500 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Puchech County, China
NTSC - BPM Information

QSL
WWV2500 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWV Website



More pictures

More pictures
WWVH2500 KHzNIST radio station WWVH, P.O Box 417, Kekaha, HI 96752, USA

Hawaii
NIST - WWVH Website

CHU3330 KHzInstitute for National Measurement Standards, National Research Council of Canada (NRC-INMS), 1200 Montreal Rd, Bldg M-36, Ottawa, Ontario, K1A OR6, Canada NRC - CHU Website

HD2IOA3810 KHzInstituto Oceanografico de la Armada, Casilla 5940, Guayaquil, Ecuador HD2IOA Wikipedia Page

QSL
RWM4996 KHzMain Metrological Center of the State Sevice for Time, Frequency and Earth rotation parameters determination (SSTF), National Research Institute for Physicotechnical and Radio Engineering Measurements (FSUE "VNIIFTRI"), Moscow Region, 141570 Mendeleevo, Russia RWM Wikipedia Page

QSL
EBC4998 KHzSan Fernando, Spain --- Suspended

QSL
BPM5000 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Lintong, China
BPM Website

QSL
BPM5000 KHzPuchech County, China NTSC - BPM Information

QSL
WWV5000 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWV Website



More pictures

More pictures
WWVH5000 KHzNIST radio station WWVH, P.O Box 417, Kekaha, HI 96752, USA

Hawaii
NIST - WWVH Website

HLA5000 KHzCenter for Time and Frequency, Korea Research Institute of Standards & Science (KRISS), P.O Box 102, Yusong, Daejeon 305-600, South Korea HLA Website

QSL
YVTO5000 KHzCaracas, Venezuela YVTO Wikipedia page

QSL
HD2IOA7600 KHzGuayaquil, Ecuador HD2IOA Wikipedia Page

QSL
CHU7850 KHzInstitute for National Measurement Standards, National Research Council of Canada (NRC-INMS), 1200 Montreal Rd, Bldg M-36, Ottawa, Ontario, K1A OR6, Canada NRC - CHU Website

RWM9996 KHzMain Metrological Center of the State Sevice for Time, Frequency and Earth rotation parameters determination (SSTF), National Research Institute for Physicotechnical and Radio Engineering Measurements (FSUE "VNIIFTRI"), Moscow Region, 141570 Mendeleevo, Russia RWM Wikipedia Page

QSL
BPM10000 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Lintong, China
BPM Website

QSL
LOL10000 KHzServicio de Hidrografia Naval, Observatorio Naval, Av. Espana 2099, 1107 Buenos Aires, Argentina LOL Website

QSL
PYT10000 KHzDivisao Servico da Hora (DSHO), Observatorio Nacional, R. Gal. Jose Cristino 77, Sao Cristovao, Rio de Janeiro, CEP 20921-400, Brazil PYT Website

QSL
BPM10000 KHzPuchech County, China NTSC - BPM Information

QSL
WWV10000 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWV Website



More pictures

More pictures
WWVH10000 KHzNIST radio station WWVH, P.O Box 417, Kekaha, HI 96752, USA

Hawaii
NIST - WWVH Website

CHU14670 KHzInstitute for National Measurement Standards, National Research Council of Canada (NRC-INMS), 1200 Montreal Rd, Bldg M-36, Ottawa, Ontario, K1A OR6, Canada NRC - CHU Website

RWM14996 KHzMain Metrological Center of the State Sevice for Time, Frequency and Earth rotation parameters determination (SSTF), National Research Institute for Physicotechnical and Radio Engineering Measurements (FSUE "VNIIFTRI"), Moscow Region, 141570 Mendeleevo, Russia RWM Wikipedia Page

QSL
BPM15000 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Lintong, China
BPM Website

QSL
BPM15000 KHzNational Time Service Center (NTSC), Chinese Academy of Sciences, P.O Box 18, Lintong 710600, Shaanxi, P.R.China

Puchech County, China
NTSC - BPM Information

QSL
WWV15000 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWV Website



More pictures

More pictures
WWVH15000 KHzNIST radio station WWVH, P.O Box 417, Kekaha, HI 96752, USA

Hawaii
NIST - WWVH Website
Recording of WWVH (1)

Recording of WWVH (2)

Recorded in Sydney, Australia on 2nd February 2014
EBC15006 KHzSan Fernando, Spain --- Suspended

QSL
WWV20000 KHzNational Institute of Standards and Technology (NIST), Physical Measurement Laboratory, TIme & Frequency Division, 325 Broadway, M/S 847, Boulder, CO 80305-3328, USA NIST - WWV Website



More pictures

More pictures
MIKES25000 KHz Centre for Meteorology and Accreditation
MIKES PO BOX 9, Tekniikantie 1, 02151 ESPOO Finland
MIKES Website
Recording of MIKES

Recorded in Sydney, Australia on 2nd February 2014
QSL
Time signals of BPM China received on 5 MHz:

Time signals of WWVH Hawaii and BPM China received simultaneously on 5 MHz:

Time signals of WWVH Hawaii, WWV Colorado and BPM China received simultaneously on 5 MHz:

WWVH Hawaii and WWV Colorado on 15 and 10 MHz:

Another strong reception of both WWVH Hawaii and WWV Colorado on 15MHz. Note very unique 'foot print' characteristics of WWVH.

WWVH Hawaii, received on 2.5 MHz:

And here is a snapshot of very good opening which occurred right on the local sunset: the WWV from Colorado clearly audible and visible. Frequency: 2.5 MHz. ERP: 2.5KW

Decoding of WWV 20MHz : Day/Month/Year Hour/Minute data 'extracted' from AM signal, recording.

Decoding of WWV 10MHz : Day/Month/Year Hour/Minute data 'extracted' from SSB signal, real time.

CHU transmits 3 kW signals on 3330 and 14670 KHz, and a 10 kW signal on 7850 KHz. The signal is amplitude modulated, with the lower sideband suppressed (emission type H3E). The same information is carried on all three frequencies simultaneously including announcements every minute, alternating between English and French. The CHU transmitter is located near Barrhaven, Ontario, Canada.

This is the fotprint of the CHU, as received on 7.850 MHz

Receivers: Perseus, GenesisRadio G59, Icom 7200.
Antennas: PA0RDT Miniwhip, multiband HF vertical.
Time signal decoding software: CLOCK by F6CTE. Spectral analyzer: Spectrum Lab by DL6YHF.

73, Nick VK2DX