Squad leader asked me to keep an eye on EAM messages. These happen all day every day and are normally not notable. They are coded military communications and there is no possibility of mere mortals decoding them. All we can do is that that messages are being passed.

That being said, one of these notations is very interesting.

The radio listener who tried to copy the message said the signal was weak and there was apparent jamming. I've never seen that in the EAM logs before (in 9 months).

I wasn't listening on the shortwave radio myself. It may not mean anything particular; possibly RF noise in the vicinity of the SDR radio they use. Or possibly actual signal jamming.

Maybe I'll get on the shortwave tomorrow and listen for myself.

Planefag/radiofag.

>>2350085

No. Each line is one single transmission. See the date and timestamp next to it? Volunteers listen to the radio and copy down the messages and post them to a website. These military transmissions are sent on shortwave frequencies.

"The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets. All worldwide receiving and transmitting sites in the HFGCS system are remotely controlled from Andrews Air Force Base and Grand Forks Air Force Base. Before 1 October 2002 it was known as the Global High Frequency System (GHFS). "

So depending on where in the world the receiving antenna is located that the volunteer was listening with, there could have been interference that was local to their site. Or there could have been an issue with the (multiple) transmitters. An antenna problem. An equipment problem.

Although a radiofag, it's not clear to me exactly how the GHFS works. They have transmitters located in different places, and are able to operate them remotely. Therefore, do they all transmit simultaneously? I think not because that would cause echoes due to the delay, and make the transmissions LESS readable rather than more. So probably one transmission, that was being sent from one particular tranmitter site, was unreadable at the particular receiver. (This is really very normal with HF shortwave – signals fade, lightning crackles with static, sometimes people transmit on the wrong frequency where they shouldn't be, terrestrial sources like motors and switches and electric lines create RF interference, etc.)

That and 2c will buy you a cup of covfefe.

>>2350252

ALL STATIONS is a category of message.

It means the message is addressed to everybody and not to one specific destination.

The ALL STATIONS message had interference. The next one didn't.

Sorry I was unclear.

>>2350345

It would be interesting if there was, but until I sit down at the radio and listen for myself it would be stupid to opine any further. Frankly it is perfectly normal to hear inference all the time on all shortwave frequencies. It varies with time of day, frequency, solar cycle, amount transmissions close together, wind on the antenna, many other factors. I probably shouldn't have mentioned it.

GN anons.