PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-15:58:10
G02     201.0          16.6               13.1 +/-    0.82      31.4 +/-    0.82  0.140 / 0.290
G06     171.6          52.1               13.6 +/-    0.86      16.8 +/-    0.86  0.120 / 0.310
G13     230.2          14.4               12.4 +/-    1.10      31.3 +/-    1.10  0.090 / 0.270
G17     23.9           59.0               10.9 +/-    0.47      12.4 +/-    0.47  0.100 / 0.250
G19     325.1          71.7               11.3 +/-    0.53      11.8 +/-    0.53  0.090 / 0.140
G24     312.3          27.0                7.7 +/-    1.39      14.4 +/-    1.39  0.080 / 0.190
G28     86.6           40.4               10.6 +/-    0.66      15.3 +/-    0.66  0.030 / 0.040
G30     157.4          17.9                9.7 +/-    1.19      22.4 +/-    1.19  0.020 / 0.040