I remember that Robi (I think) in here had that album cover as avatar, so when I found out that it was a Tangerine Dream album not so long ago, I tried to find some snippets. Sadly that didn't work well as the tracks on that album, like many other are so long that you don't get a clear impression of the track.
But now as you mention it, it must be worth checking out. Some of those albums can be found for not much, so I might just buy some.