| Acronym | Meaning |
| UHF | Ultra High Frequency |
| SSU | Stratospheric Sounding Unit (TOVS) |
| NCAR | National Center For Atmospheric Research |
| MHZ | MegaHertz |
| ECMWF | European Centre For Medium-range Weather Forecasts |
| HST | Hubble Space Telescope |
| BIBEX | Biomass Burning Experiment |
| HZ | Hertz |
| HSRL | High Spectral Resolution Lidar |
| OSO | Orbiting Solar Observatory |