Reference: Chen, S.P., Bilitza, D., Liu, J.Y., Caton, R., Chang, L.C., Yeh, W.H.: An Empirical Model of L-band Scintillation S4 index Constructed by Using FORMOSAT-3/COSMIC Data, Adv. Space Res., Accepted, https://doi.org/10.1016/j.asr.2017.05.031, 2017.