| Acronym | Meaning |
| ABS | Advanced Baseline Sounder |
| NCDC | National Climatic Data Center |
| MSL | Mean Sea Level |
| TOVS | TIROS Operational Vertical Sounder |
| HIMSS | HIgh-resolution Microwave Spectrometer Sounder |
| XBSS | X-ray Background Survey Spectrometer |
| MB | Millibar(s) |
| GEWEX | Global Energy And Water Cycle EXperiment (WCRP) |
| KB/S | Kilobits Per Second |
| HZ | Hertz |