Shortwave Radiogram images

These pages display images from the weekly radio program Shortwave Radiogram. Shortwave Radiogram transmits digital text and images on an analog shortwave broadcast transmitter. The program is produced and presented by Dr. Kim Andrew Elliott.

Anyone with a shortwave receiver can listen to this program's spoken-text preamble, lasting 90 seconds or so. (Your reception will depend on your location and equipment and on the atmospheric conditions prevailing at the time.) The program then continues using a digital signal that can be interpreted by computer software. Audio from your receiver is fed to the computer, interpreted by the software, and converted to text and images. To decode the digital text and images transmitted on Shortwave Radiogram, most listeners use fldigi for PCs (Windows, Mac, Linux, BSD) or the TIVAR app for Android devices.

I use fldigi on Windows to capture Shortwave Radiogram's text and images with my amateur radio transceiver in Oakland, California, USA, listening to radio transmissions originating in Pennsylvania or Florida. In some cases I capture images from more than one broadcast of the same weekly program. With good solar and atmospheric conditions, I capture a fairly-good copy of every image transmitted. Under poor conditions, captured images will be of poor quality, and reception of some may fail altogether.

I obtained all of the images displayed on these pages "over the air" from the broadcast stations, without any use of the internet, on the dates and at the times shown. I try to obtain the caption text in the same way, but because the same caption text may apply to multiple copies of the same image (from different broadcasts), I will use all received copies of the text to determine the transmitted text. I may also use the text associated with the image source, at the linked URL, to supplement or replace the text I receive over the air in cases when I cannot determine the transmitted text from the over-the-air copies of the text that I receive. (This archive is mostly about received image quality and not so much about the text.)

Use the links below to view recent images. (Dates and times are shown in UTC, Coordinated Universal Time, and are formatted as Year-Month-Day and hours:minutes.)

John Rabold
Oakland, California, USA

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