Liu , Q., Zhao, J., Chen , Y., Yu , J., Wu , S. and Wu , S. 2025. Multi-frequency and multi-system GNSS positioning error modeling and correction based on machine learning in biomechanical context. Molecular & Cellular Biomechanics. 22, 1 (Jan. 2025), 690. DOI:https://doi.org/10.62617/mcb690.