| Acronym | Meaning |
| HZ | Hertz |
| MLS | Microwave Limb Sounder (EOS) |
| ESMR | Electrically Scanning Microwave Radiometer |
| MSLP | MSL Pressure |
| KSC | Kennedy Space Center |
| ACRIM | Active Cavity Radiometer Irradiance Monitor (EOS) |
| AOT | Aerosol Optical Thickness |
| HSB | Humidity Sounder For Brazil |
| NEXRAD | NEXt Generation RADar |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System |