PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-16:57:30
G02     201.7          23.6               12.3 +/-    1.95      24.8 +/-    1.95  0.270 / 0.440
G06     165.4          60.5               13.8 +/-    0.43      15.6 +/-    0.43  0.340 / 0.490
G12     303.3          11.6                3.4 +/-   18.09       9.1 +/-   18.09  0.140 / 0.120
G17     27.1           56.1               10.1 +/-    0.72      11.9 +/-    0.72  0.120 / 0.110
G19     327.8          69.8               10.1 +/-    0.55      10.7 +/-    0.55  0.130 / 0.260
G24     305.8          33.8                8.4 +/-    1.91      13.7 +/-    1.91  0.270 / 0.360
G28     93.0           37.1               11.4 +/-    0.81      17.4 +/-    0.81  0.050 / 0.040
G30     157.9          11.2               11.0 +/-    1.34      30.0 +/-    1.34  0.040 / 0.030