| Acronym | Meaning |
 | RFNA | Red Fuming Nitric Acid |
| SID | Sudden Ionospheric Disturbance |
| LHA | Local Hour Angle |
| BH | Black Hole |
| JGR | Journal Of Geophysical Research |
| TPCE | Tank Pressure Control Experiment |
| EOS | Earth Observing System |
| NRL | Naval Research Laboratory |
| ESRO | European Space Research Organisation |
| HD | Henry Draper Catalog Entry |
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