GPS Module

The GPS (Global Positioning System) module is a sensor component in drone systems responsible for position determination and navigation. It precisely determines the drone’s location on Earth using signals received from satellites and transmits this data to the flight control system.

Working Principle

The GPS module calculates a three-dimensional position by using signals from at least four different satellites. The device’s instantaneous location is determined based on the time delay between the satellites and the module. Accuracy may vary depending on the number of satellites used and signal quality. Some modules enhance positioning precision by operating in conjunction with other GNSS systems such as GLONASS and Galileo.

Hardware/Software

• Hardware: The GPS module typically consists of an antenna and a signal processing chip mounted on a small circuit board. The antenna can also be externally added to improve signal strength.
• Software: Flight control software (e.g. ArduPilot, Betaflight) processes data received from the GPS module to manage functions such as position hold, route tracking, and return-to-home.

Applications

• Autonomous flight systems
• Return-to-Home (RTH) function
• Mapping and photogrammetry
• Logistics and cargo drones
• Route planning in agricultural drones
• Targeting and coordinate-based missions in military drones

Advantages

• Provides precise position information during flight.
• Enables the execution of autonomous missions.
• Reduces the risk of loss.
• Supports map-based operations.

Limitations

• Performance decreases in enclosed areas or locations with weak GPS signals.
• Signal latency may occur.
• Low-quality modules exhibit higher error rates.
• Can be affected by electromagnetic interference.

Application in Türkiye

In Türkiye, GPS modules such as uBlox, Beitian, and Matek are widely used in drone systems. In the defense industry, institutions such as ASELSAN are developing integrated local GPS solutions. Under the goal of domestic production, GNSS projects supported by TÜBİTAK are ongoing.