Science Station Tango Sierra was a Federation scientific research laboratory that was in service in the mid-24th century. This station was located in the Rachelis system.
In 2365, the USS Enterprise-D transported a transport container filled with strains of plasma plague from the planet 'aucdet IX to this station. The station was tasked with identifying an unidentified plasma plague that was ravaging the Rachelis system and then finding an antidote to the plague. (TNG: "The Child")
For information of the model used for this design, please see studio models.
According to the Star Trek: Star Charts (pg. 66), Science Station Tango Sierra was located near the Romulan Neutral Zone.