| Acronym | Meaning |
 | SDN | Software Development Note |
 | PN | Pseudo Noise |
 | SP | Shuttle Projects Office (KSC) |
 | CONT | Continue |
 | MFMR | Multifrequency Microwave Radiometer |
 | IMU | Inertial Measurement Unit |
 | ETA | Estimated Time Of Arrival |
 | SART | Shuttle Astronaut Recruitment Program |
 | OFI | Operational Flight Instrumentation |
 | PHMC | Probe Heater Motor Controller |