PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-02:57:50
G01     96.8           30.0                5.8 +/-    1.08      10.2 +/-    1.08  0.040 / 0.040
G07     119.6          50.5                4.6 +/-    0.66       5.8 +/-    0.66  0.040 / 0.040
G08     42.0           13.1                1.8 +/-    2.63       4.8 +/-    2.63  0.030 / 0.040
G11     77.9           42.2                3.9 +/-    0.92       5.5 +/-    0.92  0.050 / 0.040
G13     301.8          33.0                2.3 +/-    1.47       3.8 +/-    1.47  0.030 / 0.040
G17     210.9          47.5                4.6 +/-    0.55       6.0 +/-    0.55  0.020 / 0.040
G19     212.1          22.5                4.8 +/-    1.93       9.9 +/-    1.93  0.230 / 0.340
G28     339.1          61.9                3.1 +/-    0.56       3.5 +/-    0.56  0.180 / 0.220
G30     89.1           76.6                4.1 +/-    0.31       4.2 +/-    0.31  0.070 / 0.090