Apr. 2019 Niigata-ken Niigata-shi Expected value of LF field strength Transmitting Station: Ohtakadoya-yama LF station Latitude of receiver(Degree): 37.90 Longitude of receiver(Degree): 139.02 Distance from Ohtakadoya-yama LF station (km): 172 Time(JST) Field Strength(mV/m) Field Strength(dB uV/m) 0:00 3.907 71.8 1:00 3.907 71.8 2:00 3.907 71.8 3:00 4.071 72.2 4:00 6.905 76.8 5:00 6.726 76.6 6:00 5.971 75.5 7:00 5.115 74.2 8:00 5.781 75.2 9:00 5.969 75.5 10:00 5.683 75.1 11:00 5.605 75.0 12:00 5.601 75.0 13:00 5.653 75.0 14:00 5.886 75.4 15:00 5.923 75.5 16:00 5.052 74.1 17:00 6.369 76.1 18:00 6.095 75.7 19:00 6.739 76.6 20:00 4.119 72.3 21:00 3.909 71.8 22:00 3.907 71.8 23:00 3.907 71.8