PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-14:42:20
G02     228.4          66.3                7.8 +/-    0.92       8.4 +/-    0.92  0.060 / 0.080
G06     43.0           63.1                7.2 +/-    0.56       8.0 +/-    0.56  0.070 / 0.090
G12     322.0          49.5                7.3 +/-    0.55       9.2 +/-    0.55  0.030 / 0.030
G17     67.0           24.4                7.6 +/-    1.98      15.1 +/-    1.98  0.030 / 0.040
G19     46.7           46.0                6.8 +/-    0.68       9.0 +/-    0.68  0.030 / 0.020
G24     248.4          37.7                8.2 +/-    0.67      12.5 +/-    0.67  0.040 / 0.030