What functions does an Air Data Computer (ADC) perform?

The ADC processes pitot-static inputs to compute: Calibrated airspeed (CAS), True airspeed (TAS) with temperature correction, Mach number (from total/static pressure ratio), Pressure altitude, Density altitude, Vertical speed, and Static air temperature/Total air temperature. Calculations involve: ISA atmosphere model, Compressibility corrections for high speed, Angle of attack integration for advanced ADCs, and Sensor error compensation. Modern Air Data Inertial Reference Units (ADIRU) integrate ADC with IRS functions. Outputs feed displays, FMS, autopilot, flight control, and DFDR. Redundancy (typically 3 ADCs) with voting logic protects against sensor failures. DO-178C Level A software certification required.