PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-14:57:40
G02     219.3          57.9                9.9 +/-    0.78      11.5 +/-    0.78  0.060 / 0.100
G06     51.3           70.9                9.8 +/-    0.47      10.3 +/-    0.47  0.070 / 0.100
G12     320.4          42.1                8.8 +/-    1.89      12.4 +/-    1.89  0.050 / 0.060
G17     60.3           29.5                7.7 +/-    0.48      13.6 +/-    0.48  0.060 / 0.050
G19     37.1           51.0                8.1 +/-    0.43      10.0 +/-    0.43  0.030 / 0.040
G24     258.7          41.2               10.4 +/-    1.83      14.9 +/-    1.83  0.030 / 0.040
G28     124.1          12.4                8.4 +/-    1.86      22.2 +/-    1.86  0.030 / 0.050