Source Routing Transparent System Readiness Test Shipboard Receive Terminal Shuttle Requirements Traceability Station Redesign Team simple reaction time Single Rope Technique Sludge Retention Time Society of Radiological Technologists Source Route Transparent Specification Requirements Table Speech Reception Threshold Supporting Research and Technology Systems Reliability Team Scene Radiance Tape scheduled return time Secure Request Technology security response team Service Routing Transparent Ship Receive Terminal Shipboard Receive Terminals Short Range Telemetry Shortest Remaining Time Silicon Resistance Thermometer Simulation Recomputation Tool solids retention time Special Rated Thrust Special Reaction Team Speech recognition threshold spent resin tank