PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-12:57:50
G01     230.8          21.1                7.5 +/-    1.96      16.1 +/-    1.96  0.060 / 0.140
G03     297.0          65.6                7.0 +/-    0.61       7.6 +/-    0.61  0.070 / 0.110
G14     79.3           31.5                6.4 +/-    1.31      10.9 +/-    1.31  0.030 / 0.030
G16     149.4          40.3                9.0 +/-    1.89      13.0 +/-    1.89  0.030 / 0.030
G18     207.5          11.3                4.6 +/-    3.43      12.5 +/-    3.43  0.090 / 0.160
G22     215.1          73.5                8.1 +/-    0.37       8.4 +/-    0.37  0.250 / 0.270
G23     305.8          37.6                5.5 +/-    1.02       8.3 +/-    1.02  0.040 / 0.030
G26     104.4          52.4                8.9 +/-    0.75      10.9 +/-    0.75  0.050 / 0.040
G31     43.8           35.1                6.6 +/-    1.33      10.5 +/-    1.33  0.070 / 0.100