| Acronym | Meaning |
![](file.png) | (ES) | Sporadic E |
![](file.png) | ANPR | Advance Notice Of Proposed Rulemaking |
![](file.png) | HSMT | Helical Scan Magnetic Tape |
![](file.png) | PCM | Punched Card Machine |
![](file.png) | FWS | Filter Wedge Spectrometer |
![](file.png) | TIE-GCM | Thermosphere/Ionosphere/Electrodynamics General Circulation Model |
![](file.png) | GGI | GPS Geoscience Instrument |
![](file.png) | LAS | LAGEOS Apogee Stage |
![](file.png) | GOTS | GALE Oceanographic Temperature Studies |
![](file.png) | AIRFA | American Indian Religious Freedom Act |