Examination of Multi-Receiver GPS/EGNOS Positioning with Kalman Filtering and Validation Based on CORS Stations

Area of Science:

• Geomatics Engineering
• Satellite Navigation Systems
• Geodetic Surveying

Background:

• Precise navigation is crucial for various applications, including surveying and autonomous systems.
• Existing Global Positioning System (GPS) accuracy can be limited by atmospheric conditions and satellite geometry.
• Satellite-Based Augmentation System (SBAS) and Continuously Operating Reference Stations (CORS) offer potential for enhanced positioning.

Purpose of the Study:

• To present a precise navigation concept utilizing SBAS technology and CORS infrastructure.
• To evaluate the performance of GPS/EGNOS positioning with multiple receivers.
• To demonstrate the effectiveness of Kalman filtering for improving position accuracy and reliability.

Main Methods:

• Kinematic testing with three spatially distributed GPS receivers.
• Estimation of redundant GPS/EGNOS positions.
• Application of Kalman filtering for final solution computation.
• Utilizing GPS L1 code observations and EGNOS corrections.

Main Results:

• EGNOS positioning demonstrated an accuracy of 0.5-1.5 meters.
• The proposed multi-receiver Kalman filtering approach reduced 3D positioning error to below 0.3 meters.
• Reliable quality monitoring of GPS/EGNOS positioning was established using CORS stations.

Conclusions:

• The integration of SBAS and CORS significantly enhances GPS positioning accuracy.
• Multi-receiver configurations coupled with Kalman filtering provide robust and precise navigation solutions.
• The developed method offers a reliable and accurate positioning capability for demanding applications.