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
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.
| (application/vnd.google-earth.kml+xml, 24Kb, 14 Nov 2009) | ||
| (application/vnd.google-earth.kml+xml, 5Kb, 02 Feb 2008) |
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.
In order to get updates to those files, give Google Earth the link and not a local copy of the kml file.
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SID Monitoring Station by Lionel LOUDET is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 2.0 France License. |
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| Last Update: 17 Aug 2009 |
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