PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-19:42:50
G02     343.0          78.0               10.1 +/-    0.38      10.3 +/-    0.38  0.070 / 0.080
G05     163.4          35.5               13.4 +/-    0.84      21.1 +/-    0.84  0.050 / 0.100
G06     42.6           36.7                9.2 +/-    1.12      14.2 +/-    1.12  0.080 / 0.170
G12     304.3          76.7               11.0 +/-    0.53      11.3 +/-    0.53  0.270 / 0.250
G17     87.7           10.2               10.8 +/-    3.13      30.0 +/-    3.13  0.030 / 0.020
G19     75.2           28.6               10.1 +/-    1.64      18.2 +/-    1.64  0.030 / 0.030
G24     225.6          21.0               12.9 +/-    1.44      27.7 +/-    1.44  0.100 / 0.160
G25     316.8          31.0               10.5 +/-    1.05      18.0 +/-    1.05  0.080 / 0.130