| Acronym | Meaning |
 | NCAR | N/A |
| IIV&V | Independent Integration |
| NSIDC | National Snow And Ice Data Center |
| PCRGA | Precipitation Chemistry |
| LL | Lincoln Laboratories |
| SWIS | Satellite Weather Information Systems |
| API | Absolute Position Indication |
| FAGS | Federation Of Astronomical And Geophysical Services |
| IGB | International Geophysical Bulletin |
| ACV | At-completion Variance |
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