383 APPENDIX rpm revolutions per minute RS Russian Segment RT Remote Terminal RTL Ready to Latch RWS Robotics Workstation SAFER Simplified Aid for EVA Rescue SARJ Solar Alpha Rotary Joint SAW Solar Array Wing SDS Sample Delivery System SIGI Space Integrated Global Positioning System/ Inertial Navigation System S/G Space-to-Ground SM Service Module SMCC Service Module Central Computer SMTC Service Module Terminal Computer SOC state of charge SOP Secondary Oxygen Package SPARTAN Station Power, ARticulation, Thermal, and ANalysis SPDM Special Purpose Dexterous Manipulator SPOC Station Power Operations Controller SRMS Shuttle Remote Manipulator System SSC Station Support Computer SSIPC Space Station Integration and Promotion Center SSG SSIPC Support Group SSMMU Solid State Mass Memory Unit SSN Space Surveillance Network SSRMS Space Station Remote Manipulator System SSU Sequential Shunt Unit STARCOM STAtion Radio frequency COMmunications STCR Starboard Thermal Control Radiator STP Short Term Plan STS Space Transportation System SVS Space Vision System TBA Trundle Bearing Assembly TBD To Be Determined TCA Thermal Control Radiator time of closest approach TCCS Trace Contaminant Control System TCON Thermal Control TCS Thermal Control System TDRS Tracking and Data Relay Satellite TEA Torque Equilibrium Attitude THC Temperature and Humidity Control THOR Thermal Operations and Resources TIG time of ignition TITAN Telemetry Information Transfer and Attitude Navigation TMG Thermal Micrometeoroid Garment TOPO Trajectory OPerations Officer T-RAD Tile Repair Ablator Dispenser TRRJ Thermal Radiator Rotary Joint T2 Treadmill 2 TTCR Trailing Thermal Control Radiator TWMV Three-Way Mixing Valve 3-D three-dimensional UCCAS Unpressurized Cargo Common Attachment System UHF ultra-high frequency ULD Ultrasonic Leak Detector ULF Utilization Logistics Flight UMA Umbilical Mating Assembly UOP Utility Outlet Panel UPA Urine Processor Assembly USOS United States On-orbit Segment USTO USOS Thruster Only UTA utility transfer assembly UTC Coordinated Universal Time ЦВМ Russian Segment Central Computers V volt VES Vacuum Exhaust System VRA Vent and Release Assembly VRS Vacuum Resource System VVA Visiting Vehicles Officer VV DYN Visiting Vehicle Dynamics WHC Waste and Hygiene Compartment WIF Worksite Interface WLP Weekly Lookahead Plan WPA Water Processor Assembly XPOP X-Perpendicular Out of Plane YPR Yaw, Pitch, and Roll