An aircraft manufacturer's ‘Flight Test Instrumentation’ division uses data acquisition systems (DAS or DAQ for short) whose task is to record analogue sensor data. Such systems record several hundred to a thousand measurement channels, the most common sensors being strain gauges and sensors for measuring temperature or vibration. Force, pressure, displacement, angle and flow sensors are also used. In addition to recording the analogue signals, the digital data of the avionics system must also be recorded synchronously. To do this, digital interfaces such as ARINC or MIL-Bus must be able to be read and decoded by the DAQ system.

Aerospace ground equipment acts as an intermediary, enabling real-time communication, data stream monitoring, and seamless information exchange between the aircraft and ground operations. This facilitates reviewing and replicating flight maneuvers, enhancing test process flexibility and adaptability.

Measurement data can be stored within the flight test measurement system or on the flight test engineer's workstation, or transmitted directly to a ground station via IRIG 106 telemetry standards. Aerospace ground equipment includes a reception antenna for telemetry signals, a system for PCM data stream decoding, and the capability to route distinct measurement data to separate workstations. This integration enhances communication and monitoring, streamlining the flight testing process.

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