| Acronym | Meaning |
| IMU | Inertial Measurement Unit |
| NRCC | National Research Council Of Canada |
| BLS | Bureau Of Labor Statistics |
| HRV | High-resolution Visible |
| LERC | Lewis Research Center |
| SCS | Soil Conservation Service |
| GTS | Global Telecommunication System |
| ELF | Extremely Low Frequency |
| ADS | Airborne Data System |
| ERTD | Environmental Research & Technology Division |