| Acronym | Meaning |
 | PCAS | Passive Cavity Aerosol Spectrometer |
| ROCEW | Role Of Clouds |
| FASE | Foundation For Advancement In Science And Education |
| OPTRAN | Optical Test Transmittance Model |
| OFDA | Office Of Foreign Disaster Assistance |
| EOSIS | EOS Information System |
| K | A Symbol For Planetary Wave Number |
| SPL | SLATEC Plotting Library |
| ITIR | Intermediate Thermal Infrared Radiometer |
| RAS | Royal Astronomical Society |
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