| Acronym | Meaning |
| GPS-IPW | Global Positioning System-Integrated Precipitable Water |
| AC | Actual Commitment |
| IIWG | International Investigator Working Group |
| DOE/RFO | DOE Rocky Flats Office |
| EGSE | Electronic Ground Support Equipment |
| MFP | Mean Free Path |
| HMS | High-altitude Multispectral Sounder |
| APACM | Atmospheric Physical And Chemical Monitor |
| ACFM | Alternating Current Frequency Modulation |
| ARRL | Amateur Radio Relay League |