While experimenting with listening to amateur radio satellites, I saw that you can track the path of the International Space Station (ISS). As luck would have it right as I'm starting to learn about Slow Scan TV, I see that the ISS will be transmitting SSTV images via VHF for a few days. So far I've only decoded a few images on 20m SSB. After talking to Brandon (KN4HDZ), we decided to each give it a try from our stations.
My challenge was figuring out how to hook up my Yaesu FT-2980R VHF FM radio to my PC to decode these transmissions. I figured out that I could connect the external speaker jack on the rig to my SignaLink USB SPKR port! I quickly installed MMSSTV and got it working just in time for the ISS to cross over the sky.
When it was time, I received part of an image! Then after a short delay, I got another image and Brandon decoded one too! Since this was not a direct path crossing you can see the images are incomplete and have a lot of noise. But we'll try again in the coming days!
|1st ISS SSTV VHF image - KG4LST|
|2nd ISS VHF FM SSTV image - KG4LST|
|ISS SSTV - KN4HDZ|
I got set up again and there was a little more direct of a ISS cross over tonight around 8:25PM. I heard 3 total SSTV transmissions on that pass. I didn't decode much of the first one. The second one came in pretty clear (below) and I got only about half of the third one.
|4/12/2018 around 8:25PM ISS VHF FM SSTV image - KG4LST|
Then there was another pass at around 10:05PM where Brandon and I both decoded some clearer images.
|4/12/2018 around 10:05PM ISS VHF FM SSTV image - KG4LST|
|4/12/2018 around 10:05PM ISS VHF FM SSTV image - KN4HDZ|
It still blows my mind that we decoded these images on our simple VHF stations from 254 miles above Earth!
The local newspaper (The Northeast Georgian) featured a story about Brandon and I decoding these images on the front page!
73 de KG4LST sk