PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-01:42:40
G02     200.8          29.5                9.5 +/-    1.25      16.8 +/-    1.25  0.040 / 0.060
G06     168.5          61.1                9.5 +/-    0.49      10.7 +/-    0.49  0.030 / 0.030
G17     25.9           56.7                7.5 +/-    0.96       8.7 +/-    0.96  0.040 / 0.030
G19     344.4          68.8                6.8 +/-    0.43       7.3 +/-    0.43  0.030 / 0.030
G24     305.0          33.9                6.6 +/-    1.10      10.7 +/-    1.10  0.060 / 0.090
G28     96.1           35.0                7.8 +/-    0.86      12.4 +/-    0.86  0.050 / 0.090