| Acronym | Meaning |
| MM90 | N/A |
| ALT/RA | Altimeter/Radar Altimeter |
| METEOR | Multiple Experiment Transporter Into Earth Orbit And Return |
| PFU | Proto Flight Unit |
| PRAIRE | Polarization Radar Illinois Rainfall Experiments |
| IIOE | International Indian Ocean Expedition |
| MACRAT | Middle-Atmosphere Chemistry |
| PAGE | Program For The Advancement Of Geoscience Education |
| BATGE | Biosphere-Atmosphere Trace Gas Exchange In The Tropics |
| PILPS | Program For Intercomparison Of Land Surface Parameterization Schemes |