| Acronym | Meaning |
 | SMMR | Scanning Multichannel Microwave Radiometer |
| PSI | Plan Shear Indicator |
| ERL | Environmental Research Laboratory |
| JILA | Joint Institute For Laboratory Astrophysics |
| HAPEX | Hydrological Atmospheric Pilot Experiment |
| ORU | Orbital Replacement Unit |
| EIB | Environmental Improvement Board |
| DNO | Do Not Operate |
| G&A | General And Administrative |
| DCO | Delayed Compliance Order |
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