All frequencies are dial readings in USB. R = reverse shift.

Radio fax, also known as radio facsimile or weather fax, is a means of broadcasting graphic weather maps and other graphic images via HF or shortwave radio. Maps are received using a dedicated radio fax receiver. Pictures can also be received using a single sideband shortwave receiver connected to an external facsimile recorder or PC equipped with a radio fax interface and application software.

The National Weather Service (NWS) radio fax program prepares high seas weather maps for broadcast via four U.S. Coast Guard (Boston, New Orleans, Pt. Reyes, and Kodiak) and one DOD transmitter site (Honolulu). These broadcasts are prepared by the Marine Prediction Center, Tropical Prediction Center, Honolulu Forecast Office. and Anchorage Forecast Office. Limited satellite imagery, sea surface temperature maps and text forecasts are also available. The International Ice Patrol also broadcasts radio fax charts from Boston sharing the same transmitters.

The U.S. Navy terminated all regularly scheduled radio fax transmissions with the exception of the Mediterranean beginning January 1, 1998. The system is operated in a back-up mode for on-demand service by fleet units upon request. Previous plans to permanantly terminate the Navy radio fax program by January 1, 1999 were under review and no additional information is currently available on the status of that program. These transmissions are to meet the requirements of the U.S. military and have no direct connection to the National Weather Service's radio fax program.

Table 1 below is an abbreviated version of the NWS radio fax broadcast schedules. All radio fax broadcasts of National Weather Service products employ a radio fax signal of 120 lines-per-minute (LPM) and an Index-of Cooperation (IOC) of 576. These values must be entered into the users equipment or software program in order for the radio fax image to be displayed properly.

Radio Fax Broadcast
Boston, Massachusetts (NMF): 6340.5, 9110 and 12750 kHz
Start Broadcast 0230Z   0800Z   1430Z   2005Z
Broadcast Schedule      0243Z   1903Z  
Ice (Seasonal, ~Feb- Sep)       1600Z1  1810Z1
1 International Ice Patrol, call letters NIK.

New Orleans, Louisiana (NMG): 4317.9, 8503.9 and 12789.9 kHz
Start Broadcast 0000Z   0600Z   1200Z   1800Z
Broadcast Schedule      0630Z   1830Z

Kodiak, Alaska (NOJ): 2054, 4298 and 8459 kHz
Start Broadcast 0400Z   1000Z   1800Z   2200Z
Broadcast Schedule (Mon, Fri)   1838Z

Point Reyes, California (NMC): 4346 (except 2300Z), 8682, 12730, 17151.2 and 22527(2300Z) kHz
Start Broadcast 0245Z   0815Z   1100Z   1415Z   2015Z   2300Z
Broadcast Schedule      1104Z   2324Z

Honolulu, Hawaii (KVM70): 9982.5, 11090, 16135 and 23331.5 kHz
Start Broadcast 0533Z   1150Z   1733Z   2350Z
Broadcast Schedule      0533Z   1150Z   1733Z   2350Z
(Note: National Weather Service station, not U.S. Coast Guard)
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Here is the latest info I have from GFA/GFE:
          Since 1st September the new service has been broadcast using
          ALL frequencies of the two earlier services. This notification
          advises of a reduction in the number of frequencies to take
          effect from 2359 UTC on 30 NOVEMBER 1993!
          At that time transmissions on 03289.5, 04782, 09203, 11086.5,
          and 14582.5 WILL CEASE!
          Transmissions will continue on:
          04610.0  kHZ  24 hours
          08040.0  kHz  24 hours
          14436.0  kHz  24 hours
          02618.5  kHz  1800-0600 UTC
          18261.0  kHz  0600-1800 UTC
          This information will be broadcast from time to time on the
          current GFA frequencies.
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APRA HARBOUR: On 10th Okt (1315-1340) I have received on 16027.6 kHz the
          GFAX broadcast schedule (West Pacific) and there are some
          corections for the HF-FAX list:
          USN Apra Harbour GUM
          16027.6 kHz -> LSB
          05258.0 kHz -> LSB/USB
          05262.0 kHz -> LSB/USB
          10253.0 kHz -> LSB/USB
          10257.0 kHz -> LSB/USB
          19858.0 kHz -> LSB/USB
          19862.0 kHz -> LSB/USB
          23008.0 kHz -> LSB

          USN Yokosuka J
          04956.0 kHz -> USB
          12777.0 kHz -> USB
          22324.5 kHz -> USB
          Delete the other frequencies.
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DIEGO GARCIA: Transmission times:
         07582.0 kHZ -> 1400-0200 UTC
         12806.0 kHz -> Continuous
         20302.0 kHz -> 0200-1400 UTC

EXMOUTH: Transmission times:
         08614.0 kHz -> 1000-2200 UTC  ISB
         12727.5 kHz -> Continuous
         16914.5 kHz -> 2200-1000 UTC

The UNID on 07930.0 kHz is LRO 48 Buenos Aires Meteo ARG 120/576
TX time: 0100-0200 and 2000-2300 UTC (Thanks to Reid Kelly)

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The most Fax transmissions are send with a LPM (RPM) of 120  and a IOC (sometimes called Module) of 576.
Only stations with Russian equipment sometimes use RPM 60 or 90 and sometimes a IOC of 288.
Photofax transmissions such as from north Korea use RPM 60 and a IOC  352 with gray tones, and satellite rebroadcast use also RPM 120 IOC 576, with gray tones (4 or more bit Depth)

For software decoding best way is to decode with Black and White (2 bit Depth).

The Start-tone is 95 % black and 5 % white with tones with a duration of 15 to 20 seconds (called phasing) (300 Hz), the stopsignal is 450 Hz, and  this is called Automatic Picture Transmission ( APT).

Now you should heard the typical "Scratch" sound from a Fax signal, with white-tones are send with  2300 Hz, and black-tones are send with 1500 Hz.
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RN Northwood (GYA) England Offenbach (DDH), Germany Halifax (CFH), Canada US Coastguard (NMF) Boston
2618.5 (2616.6) kHz* 3855 (3853.1) kHz  4271 (4269.1) kHz  4235 (4233.1) kHz*
4610 (4608.1) kHz 7880 (7878.1) kHz 6496.4 (6494.5) kHz 6340.5 (6338.6) kHz 
8040 (8038.1) kHz  13882.5 (13880.6) kHz 10536 (10534.1) kHz 9110 kHz (9108.1) kHz
11086.5 (11084.6) kHz    13510 (13508.1) kHz 12750 (12748.1) kHz 
18261 (18259.1) kHz*       
(USB frequency) Tune to the frequency in () on a USB receiver. * NOT 24 hour operation

Text Weather Transmissions
World-wide
NAVTEX US Coastguard
using Sitor (NBDP) German weather
service Hamburg
490 (488.1) kHz 8416.6 (8414.7) kHz 4583 (4581.1) kHz
518 (516.1) kHz 12579 (12577.1) kHz 7646 (7644.1) kHz
4209.5 (4207.6) kHz 16806.5 (16804.6) kHz 10100.8 (10098.9) kHz
  22376 (22374.1) kHz  
International NAVTEX is transmitted on 518 kHz. Transmittions from more then 1 location. RTTY
Speed = 50 Baud
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Boston (NMF) 4235(02z, 08z),   6340.5,   9110,   12750(14z)   kHz  
Radiofax Broadcast
 
Start Broadcast 0230Z 0745Z 1400Z 1720Z 1900Z
Broadcast Schedule 0243Z  1405Z 
1International Ice Patrol (Seasonal, ~Feb- Sep) Call Letters NIK   1600Z1 1810Z1 
  New Orleans (NMG) 4317.9, 8503.9, 12789.9, 17146.4(12,18Z) kHz 

(Beginning Dec 05, 2003)
Radiofax Broadcast
 
Start Broadcast 0000Z 0600Z 1200Z 1800Z
Broadcast Schedule    2025Z
  Kodiak(NOJ) 2054(10z, 18z), 4298, 8459, 12412.5(4z, 22z) kHz 

(Beginning Jan 15, 2004)
 
Radiofax Broadcast
 
Start Broadcast 0400Z 0950Z 1600Z 2150Z
Broadcast Schedule   1727Z 
Note: All frequencies may be broadcast simultaneously at times
  Kodiak(NOJ) 2054(10z, 18z), 4298, 8459, 12412.5(4z, 22z) kHz 

(Until Jan 15, 2004)
 
Radiofax Broadcast
 
Start Broadcast 0400Z 1000Z 1600Z 2200Z
Broadcast Schedule   1727Z 
Note: All frequencies may be broadcast simultaneously at times
  Pt.Reyes(NMC) 4346(except 19z,23Z), 8682, 12730, 17151.2, 22527(19z,23Z) kHz  
Radiofax Broadcast
 
Start Broadcast 0245Z 0800Z 1100Z 1430Z 1930Z 2300Z
Broadcast Schedule   1104Z   2324Z
  Honolulu (KVM70) 9982.5(11z), 11090(except 23z), 16135(except 11z), 23331.5(23z) kHz  
Radiofax Broadcast
 
Start Broadcast 0533Z 1030Z 1733Z 2230Z
Broadcast Schedule  1045Z 2018Z 
(Note: DOD station, not USCG)
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weather maps on HF
The reception of weather maps on shortwave is nothing new. You should try it anyway, before the last stations disappear.

Here is a list of some station that can be received with good signal strength in northern Germany:

4306.0 kHz  GZZ2   Ny Whitehall (closed down ?)
4610.0 kHz  GFA22  Bracknell Meteo
7880.0 kHz  DDK2   DWD Quickborn
8040.0 kHz  GFA23  Bracknell Meteo
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