No FR flights use the shuttle train.
Wrong Wrong Wrong Wrong Wrong Wrong Wrong
Many FR flights use gates 20-39, which is the second stop on the transit train, always check gate numbers, seasoned travellers through STN this Summer could be caught out, many regular Air Berlin travellers assume that they depart in Satelite 1, gates 1-19, and blindly go there without thinking.
This could all change as the Summer progresses, so check check and check again, it is not easy to get from 1 satelite to the other if you are in the wrong place.