Common AbbreviationsΒΆ

ACC Accelerometer
AHRS Attitude Heading Reference System
ALT Altitude
ATC Attitude Control
AP ArduPilot
APM ArduPilot autopilot
ARSPD AirSpeed
ATT Attitude
BATT Battery
CTUN Control Tuning
DCM Discrete Cosine Matrix (first generation position/attitude estimator)
EKF Extended Kalman Filter (a predictive filter subsystem)
EK2/3 EKF2/EKF3 (ArduPilot has two generations of EKF based position/attitude estimators in the firmware)
GCS Ground Control Station
GPS Global Positioning System
GYRO Gyroscope
IMU Inertial Measurement Unit
INS Inertial Navigation System
PCS Position Control System
PM Power Module
RC Radio Control
TECS Total Energy Control System (altitude/speed controller for Plane)
WP Waypoint