| Acronym | Meaning |
 | TID | Traveling Ionospheric Disturbance |
| BPSG | Budget Planning And Systems Group |
| API | Axial Power Indicator |
| ALEC | American Legislative Exchange Council |
| AM | Audio Modulation |
| ASASP | Advanced Solid-State Array Sensor |
| UIPPA | See IUPAP |
| AQCR | Air Quality Control Regulation |
| D/L | Downlink |
| TREM | Tropical Rainfall Explorer Mission |
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