| Acronym | Meaning |
| KPM | Kometen |
| HEAO | High Energy Astronomical Observatory |
| HIRS | High Resolution Infrared Radiation Sounder |
| ALAE | Atmospheric Lyman-Alpha Emissions |
| DDTE | Design |
| HRI | High Resolution Imager |
| PMC | Permanently Manned Capability |
| OAO | Orbiting Astronomical Observatory |
| FFT | Fast Fourier Transform |
| GSO | GeoSynchronous Earth Orbit |