| Acronym | Meaning |
| DORIS | Determination D'Orbite Et Radiopositionement Integre Par Satellite |
| EMF | Electromotive Force |
| SEM | System Element Management |
| TIAA | Teachers Insurance And Annuity Association |
| GONG | Global Oscillations Network Group |
| RSF | Remote Sensing Facility |
| PIBALS | Pilot Balloons |
| EEMOC | European EMOC |
| UICP | Uniform Inventory Control Program |
| ACR | Active Cavity Radiometer |