| Acronym | Meaning |
| GOS | Global Observing System |
| UIC | Unit Identification Code |
| LCC | Life Cycle Cost |
| MACCM3 | Middle Atmosphere Community Climate Model |
| BCWS | Budgeted Cost For Work Scheduled |
| LT | Local Time |
| DOE/RF | DOE Rocky Flats Operations Office |
| NNMI | Nonlinear Normal Mode Initialization Software |
| EMEP | European Model And Evaluation Program |
| OSSE | Observing System Simulation Experiment |