February 9, 2018 Innovation: QZS-3 and QZS-4 join the Quasi-Zenith Satellite System By Peter Steigenberger, Steffen Thoelert, André Hauschild, Oliver Montenbruck, and Richard B. Langley
August 23, 2017 QZS-2 signal analysis, QZS-3 launched By Steffen Thoelert, André Hauschild, Peter Steigenberger, Oliver Montenbruck, and Richard B. Langley