PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-03:57:50
G01     75.0           33.2                6.1 +/-    0.68       9.9 +/-    0.68  0.030 / 0.050
G07     135.3          34.1                8.7 +/-    1.43      14.1 +/-    1.43  0.030 / 0.050
G11     57.5           34.0                3.7 +/-    0.57       6.0 +/-    0.57  0.060 / 0.080
G13     280.2          37.3                4.3 +/-    1.10       6.5 +/-    1.10  0.040 / 0.090
G15     304.9          15.0                0.4 +/-    1.61       1.1 +/-    1.61  0.080 / 0.300
G17     228.0          65.9                6.5 +/-    1.27       7.1 +/-    1.27  0.090 / 0.280
G19     221.8          39.7                5.5 +/-    1.91       8.0 +/-    1.91  0.030 / 0.040
G28     14.7           59.8                3.5 +/-    0.66       4.0 +/-    0.66  0.030 / 0.030
G30     131.3          62.0                6.9 +/-    0.71       7.7 +/-    0.71  0.060 / 0.090