AmateurRadio.com

Weather out over oceans?  That, and more.

More than international broadcast stations and amateur radio operators exist on the shortwave radio spectrum.  For instance, any non-broadcast signal that is not amateur radio is often lumped together into a category known as Utility Radio, abbreviated, UTE.  To dig deeper into UTE activity, you could check out the UDXF – the Utility DX Forum, located here:  https://www.udxf.nl/

Utility stations (UTE) are quite common, from marine (ships, fishing vessels, etc.), transoceanic air traffic (international passenger or cargo jets and other aeronautical trans-oceanic radio traffic), to military radio (weather, coordination, and much more).  UTE is a rich subdomain of the radio experience.

As an amateur radio operator, I listen to and monitor utility stations on shortwave, at times when not operating as an amateur radio station.  I check weather for air traffic or for marine traffic, because it helps me see the larger-scale weather patterns.

One of the captured weather images via shortwave radio.

Here is a video I made of my reception of weather charts via shortwave radio from radio station NMC, at Point Reyes, CA, using FLdigi software to receive these weather fax transmissions:

WEFAX 22.527 MHz on 2024 JUNE 14

This video is a screen and sound capture of my reception of weather charts and images by shortwave radio, from a station in California running about 4 kilowatts of RF power. This HF WEFAX (Weather Facsimile) service is on every day for ship (marine) weather dissemination so that ships out on the ocean can get weather charts and images not by satellite, but by receiving shortwave signals.

Below is a snippet from the published schedule from Point Reyes WEFAX Radio, callsign NMC, as follows:

22527 kHz – tune offset 1.9 kHz (see note, below)

UTC   WHICH CHART
----- --------------------------------
19:13 TROPICAL GOES IR SATELLITE IMAGE
19:23 WIND / WAVE ANALYSIS
19:33 96HR SURFACE FORECAST
19:43 96HR WIND/WAVE FORECAST
19:53 96HR 500MB FORECAST
20:03 96HR WAVE PERIOD / DIRECTION
-------------------------------------

The above snippet of the NMC chart transmission list is from the page, “NMC Point Reyes, Marine Radiofax Broadcast Schedule” found at:
https://weatherfax.com/nmc-point-reyes/

One of the captured weather images via shortwave radio.

Here is a detailed description of the weather charts, and online access is at:
https://www.weather.gov/marine/radiofax_charts

Note: In the video, you see that I am tuned to 22.526 USB thus I was tuned to 22526 kHz USB, based on this: “Unless otherwise stated, assigned frequencies are shown, for carrier frequency subtract 1.9 kHz. Typically dedicated radiofax receivers use assigned frequencies, while receivers or transceivers, connected to external recorders or PC’s, are operated in the upper sideband (USB) mode using carrier frequencies.”

==================================
Source:

WORLDWIDE MARINE RADIOFACSIMILE
BROADCAST SCHEDULES
U.S. DEPARTMENT OF COMMERCE
NATIONAL OCEANIC and ATMOSPHERIC ADMINISTRATION
NATIONAL WEATHER SERVICE
April 12, 2024

https://www.weather.gov/media/marine/rfax.pdf

The FCC, FEMA and NOAA are going to be conducting a nationwide test of the EAS system, November 9th, 2011. Mainly to be sure, that it works, as a national test has never never been done. While states have done local tests on a weekly and monthly basis, no one is sure if an alert on a national scale was to go out, that it would 100% work.

Photo Courtesy of Wikipedia

So on November 9th, at around 2pm, someone, somewhere at the FCC or FEMA or NOAA, will push the activate button, and TVs and radio stations across the US will play the familiar tones we all know, when we hear an alert for a storm warning or some other event. Some of the differences will be that on TVs, you may see a background image on the screen as the scrolling text goes by, telling you this is all just a test. Some may not see the background image. Also the test will last for 3 minutes, as compared to 2 minutes for all others. The main reason is to make sure the code is getting to everyone to activate. So you could see a few systems slow on the catch up. Think of it like dominoes.

Now from my experience with the EAS system, working in broadcasting, sometimes the recording length on the Endec device that radio stations use, are only set for 2 minutes to record the audio. I don’t know if this will override all that and go live as soon as it hears the codes come across, or if the units will record the audio allowing manned studios to replay the alert in a break of the programming. I think there was only 1 or 2 times that we broking into programming to play an alert. Most of the time, it was at a scheduled pause in the programming.

But either way, this should be an event to see. The whole system tested at once. I wish the guys conducting the test good luck that this system works, and I hope we’ll never have to use it either.

73.

Rich also writes a Tech blog and posts stories every Tuesday and Thursday on Q103, Albany’s #1 Rock Station website, as well as Amateur Radio stories every Monday thru Friday on AmiZed Studios and hosts a podcast called The Kim & Rich Show with his fiance’ Kim Dunne