Dirk Matussek

Born in 1963

Software author and amateur jazz musician, engineer and nerd in Frankfurt, Germany

Internet projects

ISS - current position


The position of the International Space Station ISS and its ground track in real time.

ISS sighting opportunities for any location.



AstroViewer is an interactive sky map that helps you to find your way in the night sky quickly and easily.

The Low Gs

low-gs.bandlow-gs.band (in German)

Jazz with ukulele, bass and vocals. The band.

Ukulele Voicings


Yet another website providing ukulele chord charts?

Here you find all voicings (that is where you place your fingers on the fretboard) for a given chord. And you find all chords made up by a specific voicing on your ukulele.