Sorry Oshyan, I talked nonsense: My ISS-Model is a 10-20$ model from turbosquid.
I had too much troble with the NASA versions. The "Normal Res" Version is 250 MB!
The High Res version is to be built by stitching together every single module manually!
And the LOW Res version is even worse than my Turbosquid-Model.
At that time I had the ISS only as shown in the background in my head. And for that the Turbosquid version seemed good enough.
In some days I'll see, how the animation looks like (720p upscaled to 1080i). I hope for some seconds film it will be ok, but I still have some ideas... as usual