| Abbreviation | Definition |
|---|---|
| SSEC | Space Science and Engineering Center |
| SSF | semi-Lagrangian and semi-geostrophic finite element |
| SSF | Semi-Lagrangian and Semi-geostrophic Finite-element |
| SSG | Scientific Steering Group |
| SSM/I | Special Sensor Microwave/ Imager |
| SSMC | Silver Spring Metropolitan Complex |
| SSMI | Special Sensor Microwave Imager |
| SSO | Source Selecting Official |
| SSO | Struck Submerged Object |
| SSSV | Subsurface Safety Valve |
| SST | Sea Surface Temperature |
| SSTA | Sea- Surface Temperature Anomaly |
| SSTA | Sea-Surface Temperature Anomaly |
| SSWG | Sea Scallop Working Group |
| ST | Stratosphere-troposphere |
| STA | Science and Technology Agency |
| STACS | Subtropical Atlantic Climate Studies |
| STAR | Joint CCOP/ SOPAC-IOC Working Group on South Pacific Tectonics And Resources |
| START | Global Change System for Analysis, Research, and Training |
| STAT | Stratospheric Tracers of Atmospheric Transport |