Glossary

The following table lists the terms and acronyms used throughout this document:

Term/Acronym	Definition
AGL	Above Ground Level
Beidou	Chinese positioning system
EASA	European Union Aviation Safety Agency
EMC	Electromagnetic Compatibility
GALILEO	European positioning system
GLONASS	Russian positioning system
GNSS	Global Navigation Satellite System
GPS	Global Positioning System (American positioning system)
HEIFU®	Hexa External Intelligent Flying Unit
IMU	Inertial Measurement Unit
Lisboa	Line of Sight
PCB	Printed Circuit Board
QZSS	Japanese positioning system
ROS	Robot Operating System
RTK	Real Time Kinetic
SBAS	Satellite Based Augmentation System
UAV	Unmanned Aerial Vehicle
USB	Universal Serial Bus
WEEE	Waste Electrical and Electronic Equipment