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The Potential of LEO Satellite-Based Opportunistic Navigation for High Dynamic Applications.
1French-German Research Institute of Saint-Louis, 5 Rue du Général Casssagnou, 68300 Saint-Louis, France.
Sensors (Basel, Switzerland)
|April 12, 2022
Summary
Low Earth Orbit (LEO) satellite signals offer a promising alternative for resilient navigation in Global Navigation Satellite System (GNSS)-denied environments. Integrated with inertial sensors, LEO navigation can provide competitive positioning and robust attitude estimation for high-dynamic applications.
Area of Science:
- Aerospace Engineering
- Navigation Systems
- Satellite Communications
Background:
- Resilient navigation is crucial in Global Navigation Satellite System (GNSS)-degraded or -denied environments.
- Multi-sensor data fusion using alternative technologies to GNSS is a common approach.
Purpose of the Study:
- To investigate the potential of Low Earth Orbit (LEO) satellite communication systems for high-dynamic navigation.
- To assess the integration of LEO systems with inertial measurement units (IMUs) and magnetometers.
Main Methods:
- Derived the impact of key error sources on LEO space vehicle (SV) Doppler-based navigation.
- Analyzed positioning and attitude estimation performance under various error conditions.
- Determined best, intermediate, and worst-case navigation performance scenarios.
Main Results:
- Positioning errors can be significant due to orbit errors or clock drifts but become competitive with Inertial Navigation Systems (INS) when precise orbits are available.
- Attitude estimation demonstrates resilience, tolerating substantial orbit errors and SV clock drifts.
- LEO SV signals show potential as signals of opportunity for navigation.
Conclusions:
- LEO SV signals are an attractive navigation alternative in GNSS-denied scenarios for high-dynamic vehicles.
- The integration of LEO systems with IMUs and magnetometers enhances navigation resilience.
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