Chen , Z., Xiao , Y., Ou , J., Wu , X., Hu , H., Xiao , J., Yang, S. and Gao , Z. 2025. Multi-frequency and multi-system GNSS positioning data fusion algorithm based on Kalman filter. Molecular & Cellular Biomechanics. 22, 2 (Jan. 2025), 691. DOI:https://doi.org/10.62617/mcb691.