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An Online SBAS Service to Improve Drone Navigation Performance in High-Elevation Masked Areas
Hyojung Yoon1,2, Hyojeong Seok3, Cheolsoon Lim1
1School of Aerospace Engineering, Sejong University, Seoul 05006, Korea.
Sensors (Basel, Switzerland)
|May 31, 2020
Summary
This study introduces an onboard module for drones to enhance Satellite-Based Augmentation System (SBAS) messaging. The system improves accuracy and drastically reduces initialization time, enabling reliable drone navigation in challenging environments.
Area of Science:
- Aerospace Engineering
- Geomatics Engineering
- Navigation Systems
Background:
- Drones require reliable navigation, especially in high-elevation and signal-denied areas.
- Current Satellite-Based Augmentation System (SBAS) methods have limitations for drone applications, including long initialization times and performance issues in challenging environments.
Purpose of the Study:
- To develop an effective onboard module for transmitting and applying SBAS messages to drones.
- To enable online SBAS application for drone operations, improving position accuracy and reducing initialization time.
Main Methods:
- Proposed an onboard module with correction conversion, integrity information calculation, and fast initialization request capabilities.
- Implemented an online SBAS delivery method for drone navigation.
- Evaluated system performance in open sky and SBAS signal-denied scenarios.
Main Results:
- Reduced SBAS initialization time from 70-100 seconds to 1 second.
- Improved position accuracy by 40% in signal-denied cases, reducing vertical error from 13.4 m to 5.6 m.
- Provided timely and accurate protection levels for reliable navigation solutions.
Conclusions:
- The proposed system effectively addresses current SBAS drawbacks for low-cost drone receivers.
- Enables successful drone missions by ensuring accurate positioning and availability of navigation solutions.
- Offers a practical solution for integrating drones into airspace through enhanced SBAS utilization.
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