Bruno, J.; Darugna, F.; Bolmgren, K.; Wübbena, J. B.; Mitchell, C.; Schmitz, M. Quality Analysis of Dual-Frequency Smartphone-Based Ionospheric TEC Measurements: What Can Be Achieved?. Ann. Geophys. 2021, 64 (1), RS103. https://doi.org/10.4401/ag-8517.