This is the train station at Strasbourg Airport (follow the signs in the terminal for access). Trains run every 15 minutes and it takes 9 minutes to go from the airport to the main train station in Strasbourg.
There are trains from 5:30am to 7:30pm and a one trip costs €4, ticket is good for public transport in Strasbourg.
The train station and airport are linked via footbridge and walkway. The airport is a about a 5 minute walk from the station. Just follow the signs or aeroplane logo.
When arriving from the airport terminal there are also signs to direct you to the platforms and where you can buy tickets.
You can find the train schedule here. Site is in French but here's how to go about getting the schedule:
There are monitors for arriving and departing trains.
Train station platform.
Type of train used to access the airport and Strasbourg.