Used to collect, route and process information throughout the
orbiter and its payloads.
Code Modulation Master Unit
Receives data from MDMs and formats them for transmission to the
Network Signal Processor
Responsible for processing and routing commands, telemetry and
voice between the orbiter and the ground.
Command Interface Logic
Also referred to as the ground command interface logic controller.
General-Purpose Computer and Communication
Computers process communication controls and provide a command
path between the ground and orbiter subsystems.
A stable crystal-controlled timing source for the orbiter.
Used for serial recording and dumping of digital voice and PCM data.
Records and dumps payload data through S-Band or Ku-Band transmitter.
Interim system designed tro transmit written data from the ground
to the crew.
Text and Graphics System
Fax scanner on the ground that sends text and graphics to hard copier
Closed-Circuit Television System
Used to support on-orbit activities that require visual feedback
to the crew.
Orbiter Experiments Support Systems for OV-102 (Columbia)
Records data obtained through OEX sensors.
Shuttle Infrared Leeside Temperature Sensing
Obtains high-resolution infrared imagery of orbiter surfaces during
Shuttle Entry Air Data System
takes measurements required for precise determination of air
data during launch and landing phases.
Shuttle Upper Atmosphere Mass Spectrometer
Obtains measurements of free-stream density during atmospheric
Aerodynamic Coefficient Identification Package
A group of senssors palced on the orbiter to obtain experiment
measurements unavailable through the baseline system.
High-Resolution Accelerometer Package
Measures low-level aerodynamic accelerations along the orbiter's
principal axed during re-entry.
Modular Auxiliary Data System
Measures and records selected pressure,
temperature, strain, vibration and event data.