PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-18:12:50
G01     320.0          15.7                7.1 +/-    1.31      17.3 +/-    1.31  0.170 / 0.320
G08     257.8          14.7                8.5 +/-    2.18      21.3 +/-    2.18  0.120 / 0.280
G10     75.7           54.1                8.8 +/-    0.69      10.5 +/-    0.69  0.090 / 0.190
G11     304.5          22.6                6.6 +/-    1.42      13.7 +/-    1.42  0.080 / 0.220
G14     289.4          70.5                8.8 +/-    0.68       9.3 +/-    0.68  0.070 / 0.040
G18     305.2          41.2                8.0 +/-    1.32      11.4 +/-    1.32  0.060 / 0.050
G20     103.0          31.0               10.5 +/-    1.20      18.0 +/-    1.20  0.040 / 0.040
G27     228.3          11.3                8.0 +/-    4.20      21.8 +/-    4.20  0.040 / 0.040
G31     179.8          35.5               12.0 +/-    1.42      18.9 +/-    1.42  0.160 / 0.250
G32     358.5          70.1                8.7 +/-    0.51       9.2 +/-    0.51  0.140 / 0.250