It appears that a SSTV store and forward system is active on the ISS. I wrote something on Twitter but I didn't get an answer.
A few days ago I left a system to automatically receive SSTV signals from the ISS.
During the Inter-MAI-75 activity the signal was modulated with low index and the image quality was poor.
With the second event dedicated to W5LFL, the transmissions are good again with excellent images received.
Here the surprise; together with the images of the event I also received images that were not related to the commemoration. In doing an Internet search, I discovered this supposed Store and forward system. Has anyone received strange images like this from the ISS?