The Application is the backend of the Telestion ecosystem and based on Java (or, more generally speaking, the Java Virtual Machine).
The Application processes incoming data, parses it, saves it to a database, etc. All in all, it's the part doing the necessary Ground Station Magic to enable Telestion to work.
Typically, Telestion projects use a mix of pre-defined and custom so-called Verticles that, together, create the full Ground Station.
The following sections teach you everything you need to know to develop for the Application within the Telestion ecosystem.