A reportage by Ms. Cornelia Borrmann, Deutsche Welle describes the ambitions of S4 in a video report released by TV station. A link to the complete video is https://www.dw.com/de/kleiner-feiner-smarter-satelliten-in-neuen-dimensionen/av-55711608 , S4 has been reported starting 04:18 in the video until 06:18.