VLF Stations List

Here is a list of VLF transmitters suitable for SID monitoring. Unless otherwise stated, they transmit almost 24/7. Those stations are used either as a communication means with submarines or for time signal.

Note:
This list is a synthesis of several sources and may contain obsolete or erroneous information.
Do not hesitate to contact me for any addition or correction.

Last Update: 14 Nov 2009

Call sign	Notes	Frequency	Location	Latitude	Longitude	Aerial View
JXN	⁽¹⁾	16400	Novik, Norway Locator: JP66wx	N 66° 58' 27.67" (+66.974353°)	E 013° 52' 25.02" (+013.873617°)
VTX		17000	Vijaya Narayanam, India Locator: MJ88vj	N 08° 23' 13.25" (+08.387015°)	E 077° 45' 9.94" (+077.752762°)
SAQ	⁽²⁾	17200	Grimeton, Sweden Locator: JO67ec	N 57° 06' 47.42" (+57.113171°)	E 012° 23' 50.20" (+012.397277°)
RDL	⁽³⁾	18100	? Locator: ------	- --° --' --.--" (---.------°)	- ---° --' --.--" (----.------°)
NTS		18600	Woodside, Victoria, Australia Locator: QF31lm	S 38° 28' 52.65" (-38.481290°)	E 146° 56' 7.15" (+146.935321°)
GBZ	⁽⁴⁾	19600	Anthorn, UK Locator: IO84iv	N 54° 54' 41.91" (+54.911643°)	W 003° 16' 42.44" (-003.278456°)
NWC		19800	Harold E. Holt, North West Cape, Exmouth, Australia Locator: OG78be	S 21° 48' 58.78" (-21.816328°)	E 114° 09' 56.11" (+114.165586°)
ICV		20270	Isola di Tavolara, Italy Locator: JN40uw	N 40° 55' 23.26" (+40.923127°)	E 009° 43' 51.64" (+009.731011°)
FTA	⁽⁵⁾	20900	Sainte-Assise, France Locator: JN18gn	N 48° 32' 40.68" (+48.544632°)	E 002° 34' 45.94" (+002.579429°)
NPM		21400	Pearl Harbour, Lualuahei, HI Locator: BL01wk	N 21° 25' 12.60" (+21.420166°)	W 158° 09' 4.10" (-158.151140°)
HWU	⁽⁶⁾	18300 21750 22600	Rosnay, France Locator: JN06or	N 46° 42' 47.26" (+46.713129°)	E 001° 14' 42.89" (+001.245248°)
GQD	⁽⁷⁾	22100	Skelton, UK Locator: IO84nr	N 54° 43' 54.48" (+54.731799°)	W 002° 52' 58.92" (-002.883033°)
NDT		22200	Ebino, Japan Locator: PM52jb	N 32° 04' 34.94" (+32.076372°)	E 130° 49' 43.05" (+130.828625°)
DHO38	⁽⁸⁾	23400	Rhauderfehn, Germany Locator: JO33tb	N 53° 04' 44.04" (+53.078900°)	E 007° 36' 54.00" (+007.615000°)
NAA		24000	Cutler, ME Locator: FN64ip	N 44° 38' 41.77" (+44.644936°)	W 067° 16' 53.90" (-067.281639°)
NLK		24800	Oso Wash, Jim Creek, WA Locator: CN98ae	N 48° 12' 12.55" (+48.203487°)	W 121° 55' 0.58" (-121.916827°)
NML	⁽⁹⁾	25200	La Moure, ND Locator: EN06ti	N 46° 21' 57.56" (+46.365990°)	W 098° 20' 8.30" (-098.335638°)
TBB		26700	Bafa, Turkey Locator: KM37pj	N 37° 24' 45.81" (+37.412725°)	E 027° 19' 24.03" (+027.323342°)
NRK/TFK		37500	Grindavik, Iceland Locator: HP83su	N 63° 51' 1.31" (+63.850365°)	W 022° 28' 0.38" (-022.466773°)
JJY-40	⁽¹⁰⁾	40000	Ohtakadoya-yama, Japan Locator: QM07ki	N 37° 22' 21.35" (+37.372598°)	E 140° 50' 56.06" (+140.848906°)
NAU		40800	Aguada, Puerto Rico Locator: FK68jj	N 18° 23' 55.54" (+18.398762°)	W 067° 10' 39.36" (-067.177599°)
NSY		45900	Niscemi, Italy Locator: JM77fd	N 37° 07' 32.37" (+37.125660°)	E 014° 26' 11.10" (+014.436416°)
MSF	⁽¹¹⁾	60000	Anthorn, UK Locator: IO84iv	N 54° 54' 40.30" (+54.911195°)	W 003° 16' 45.49" (-003.279302°)
WWWB	⁽¹²⁾	60000	Fort Collins, Colorado Locator: DN70lq	N 40° 40' 40.14" (+40.677816°)	W 105° 02' 51.11" (-105.047530°)
JJY-60	⁽¹³⁾	60000	Hagane-yama, Japan Locator: PM53cl	N 33° 27' 55.56" (+33.465433°)	E 130° 10' 31.49" (+130.175415°)
FUG		62600	La Régine, France Locator: JN13bj	N 43° 23' 12.47" (+43.386798°)	E 002° 05' 50.60" (+002.097388°)
FUE		65800	Kerlouan, France Locator: IN78tp	N 48° 38' 15.62" (+48.637672°)	W 004° 21' 2.61" (-004.350725°)
HBG	⁽¹⁴⁾	75000	Prangins, Switzerland Locator: JN36dj	N 46° 24' 22.36" (+46.406211°)	E 006° 15' 4.56" (+006.251267°)
DCF77	⁽¹⁵⁾	77500	Mainflingen, Germany Locator: JO40ma	N 50° 00' 55.48" (+50.015411°)	E 009° 00' 29.90" (+009.008307°)

Notes:
⁽¹⁾ : Transmits only 6 times a day: 00:00-00:55, 04:00-04:55, 8:00-08:55, 12:00-12:55, 16:00-16:55, 20:00-20:55 UTC.
⁽²⁾ : Historic station only active twice-yearly on special occasions. SAQ website:
⁽³⁾ : Sporadic transmissions. Transmitter location varies and for most of them is unknown. Candidate sites are: Krasnodar; Nizhniy Novgorod; Arkhangelsk; Tashkent, Uzbekistan; Molodechno, Belarus; Kalinigrad.
⁽⁴⁾ : Location of GBZ uncertain: Skelton or Anthorn.
⁽⁵⁾ : Transmissions of FTA and HWU are mutually exclusive.
⁽⁶⁾ : Transmissions of FTA and HWU are mutually exclusive. HWU alternates between 18.3kHz, 21.75kHz and 22.6kHz.
⁽⁷⁾ : Location of GQD uncertain: Anthorn or Skelton.
⁽⁸⁾ : Off-air daily from 7:00 to 8:00 UTC.
⁽⁹⁾ : Off-air on Tuesdays from 12:00 to 19:00 UTC.
⁽¹⁰⁾ : Time Signal. JJY-40 website:
⁽¹¹⁾ : Time Signal. MSF website:
⁽¹²⁾ : Time Signal. WWWB website:
⁽¹³⁾ : Time Signal. JJY-60 website:
⁽¹⁴⁾ : Time Signal. HBG website:
⁽¹⁵⁾ : Time Signal. DCF77 website:

Here are some KML files of the above transmitters. These files can be viewed using Google Earth.
In order to get updates to those files, give Google Earth the link and not a local copy of the kml file.

VLF transmitters		(application/vnd.google-earth.kml+xml, 24Kb, 14 Nov 2009)
Time Signal transmitters		(application/vnd.google-earth.kml+xml, 5Kb, 02 Feb 2008)

Other VLF Stations

For information, here are lists of other transmitters operating in the VLF or LF frequency range.
They usually cannot be used for SID monitoring: several transmitters could share the same frequency or a given transmitter could use several frequencies. Moreover, some of those satations are off air.

Alpha (RSDN-20) is a Russian system for long range radio navigation. It operates on the frequencies: 11904.76190, 12648.80952, 14880.95238, 14881.09127, 12090.77381 and 12044.27083 Hz.
A location is determined by the phase difference between the received signals.
The OMEGA was a radio navigation system for aircraft. The system consisted in 8 stations, operating between 10 and 14 kHz. Omega was stopped on September 30, 1997.
A location is determined by the phase difference between the received signals.
LORAN is also a radio navigation system. It operates from 90 to 110 kHz. A similar system, called Chayka (seagull in English) is interoperable with LORAN and is in use in Russia.
A location is determined by the time interval between the received signals.

In order to get updates to those files, give Google Earth the link and not a local copy of the kml file.

ALPHA (RSDN-20) transmitters		(application/vnd.google-earth.kml+xml, 1Kb, 05 Nov 2007)
Former OMEGA transmitters		(application/vnd.google-earth.kml+xml, 3Kb, 09 Jun 2008)
LORAN-C transmitters		(application/vnd.google-earth.kml+xml, 56Kb, 05 Nov 2007)