| Abbreviation | Definition |
|---|---|
| TOS | TIROS Operational System |
| TOTO | Totable Tornado Observatory |
| TOVS | TIROS (Television Infra-Red Observation Satellite) Operational Vertical Sounder |
| TOVS | TIROS Operational Vertical Sounder |
| T-POP | TOGA Program on Prediction |
| TPPN | Trans- Pacific Profiler Network |
| TPPN | Trans-Pacific Profiler Network |
| TPS | Trans-Pacific Sections |
| TPTMS | Tropical Pacific Thermal Monitoring System |
| TPX | Trans- Pacific Exchange |
| TQV | Total Qualifying Volume |
| TRACIR | Tracking Air with Circularly Polarized Radar |
| TRANSPAC | North Pacific Ocean Monitoring for Climate Research |
| TREE | Tropical Rainforest Ecology Experiment |
| TREMORS | Tsunami Risk Evaluation through Seismic Moment from Real-Time System |
| TRIM | Terrain Resource Inventory Mapping |
| TRIM | Tidal Residual Intertidal Mudflat |
| TRMM | Tropical Rainfall Measuring Mission |
| TROPEX | Tropical Experiment |
| TROPICHEAT | Tropical Pacific Upper Ocean Heat and Mass Budgets |