The satellite data in simple.czml is defined in ICRF, so that’s the way it gets drawn. On the STK Components side, you want to add the CesiumReferenceFrameExtension to your Satellite and tell it to use ICRF frame. (I forget the exact code offhand, but it should be a one-liner. If you are still having problems let me know and I’ll post it when I’m back in the office.