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Session B5a: LEO-PNT: Concepts, Systems and Use Cases

Strategies for Ambiguity Resolution in LEO-PNT Systems with Various Frequency Bands
Lotfi Massarweh, Sandra Verhagen, Geoscience and Remote Sensing, Delft University of Technology
Location: Grand Ballroom ABC
Date/Time: Thursday, May. 1, 11:03 a.m.

In this paper, we investigate strategies for ambiguity resolution in Low Earth Orbit Positioning, Navigation, and Timing (LEO-PNT) systems, particularly across multiple frequency bands beyond the traditional L-band used in GNSS. By leveraging the rapid geometric change of LEO satellites, our study examines the feasibility of fast and reliable integer ambiguity resolution (IAR) in Precise Point Positioning with Ambiguity Resolution (PPP-AR). Using end-to-end simulations, we assess the impact of different signal bands on convergence time and positioning accuracy. The methodology incorporates the LAMBDA 4.0 toolbox for mixed-integer estimation models, providing insights into how LEO-PNT enhances PPP-AR performance. Results demonstrate significant improvements in ambiguity resolution success rates and positioning convergence when incorporating LEO signals, highlighting their potential in future PNT application.
Index Terms—Global Navigation Satellite System, LEO-PNT, Precise Point Positioning, Ambiguity Resolution, LAMBDA.

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