| Acronym | Meaning |
 | TTC | Tunnel Thermal Control |
| VIB | Vertical Integration Building |
| NASA | National Aeronautics And Space Administration |
| PAM | Pulse Amplifier Modulation |
| T/O | Takeover |
| SIU | Signal Interface Unit |
| VSWR | Visual Standing Wave Ratio |
| GDSM | Ground Data Systems Manager |
| BMB | Base Maintenance Building |
| VERN | Vernier |
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