PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-00:27:10
G02     205.2          43.7               14.5 +/-    0.41      19.9 +/-    0.41  0.190 / 0.240
G06     142.8          76.1               13.1 +/-    0.72      13.5 +/-    0.72  0.150 / 0.220
G12     311.4          20.7               10.2 +/-    1.26      22.0 +/-    1.26  0.120 / 0.100
G19     14.1           61.0               11.5 +/-    0.66      12.9 +/-    0.66  0.060 / 0.080
G24     289.4          40.9               15.6 +/-    4.88      22.4 +/-    4.88  0.030 / 0.030
G28     109.6          25.8               12.7 +/-    0.94      24.4 +/-    0.94  0.030 / 0.020