Figure S1. Reproduction test of Figure 1 and Figure 3 in I&U16 using the same satellite-central station pair as theirs. The central station is Kitaibaraki (0214), the satellite is PRN26. The regression curves are septic functions. (a) The day of Tohoku-Oki earthquake. The time of the mainshock is indicated by the vertical line. (b) Forty days (DOY30), (c) 30 days (DOY40), (d) 20 days (DOY50), and (e) 10 days (DOY60) before the earthquake. They are good reproductions of I&U16.