PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-00:12:30
G02     219.3          65.2               12.3 +/-    0.79      13.4 +/-    0.79  0.050 / 0.060
G06     50.2           70.8                9.7 +/-    0.32      10.2 +/-    0.32  0.050 / 0.060
G12     319.7          39.5                8.6 +/-    1.14      12.6 +/-    1.14  0.230 / 0.320
G17     58.1           33.5                8.7 +/-    2.40      14.2 +/-    2.40  0.360 / 0.390
G19     42.6           47.6                9.5 +/-    1.00      12.3 +/-    1.00  0.030 / 0.020
G24     260.5          40.6               12.2 +/-    4.50      17.5 +/-    4.50  0.030 / 0.030
G28     125.2          10.5               14.8 +/-    2.58      40.9 +/-    2.58  0.080 / 0.110