| Acronym | Meaning |
 | CRAS | CIMSS Regional Assimilation System |
| OSS | Office Of Space Science (NASA) |
| EOS | Earth Observing System |
| MODIS-N | MODerate-resolution Imaging Spectroradiometer-Nadir (EOS) |
| IRIS | Infrared Radiation Interferometer Spectrometer (1960s) |
| AURA | Association Of Universities For Research In Astronomy |
| OSO | Orbiting Solar Observatory |
| EPA | Environmental Protection Agency (U.S.) |
| HSRL | High Spectral Resolution Lidar |
| EDC | EROS Data Center |
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