In addition to the Interkosmos diploma (info in related article) you can also use your reception to qualify for the NASA on the air activity. Their website is
https://nasaontheair.wordpress.com/ and has all the details about which NASA amateur radio clubs are supporting and when. Receiving ISS SSTV is listed in the rules section (
https://nasaontheair.wordpress.com/rules/) and will be a nice addition to the award with this SSTV activity taking place for Cosmonautics day.