Funny, I saw this posted on /r/amateurradio and the app works really well. I just got my FCC license a few weeks ago and was inspired by some YT clips to try to talk to the ISS. A guy in Italy made a home-brew arduino az/el mount for his antenna so it tracks ISS as it moves across the sky so the radio can do its job:
Cool stuff. Any HNers into radio in NYC? With the RTLSDR you can easily listen (and visualize) all the NYPD channels.. fun stuff: http://imgur.com/f77GsUC
https://www.youtube.com/watch?v=0kTBOxZUWrc (English, no contact) https://www.youtube.com/watch?v=59Ik-xHzM_A (Italian, reception worked)
Cool stuff. Any HNers into radio in NYC? With the RTLSDR you can easily listen (and visualize) all the NYPD channels.. fun stuff: http://imgur.com/f77GsUC