PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-14:42:50
G01     127.4          11.4               12.4 +/-    2.56      33.5 +/-    2.56  0.050 / 0.050
G07     50.9           69.7               10.9 +/-    0.38      11.6 +/-    0.38  0.050 / 0.050
G08     51.0           40.2                9.4 +/-    0.92      13.6 +/-    0.92  0.030 / 0.030
G09     177.4          35.5               11.5 +/-    1.69      18.0 +/-    1.69  0.040 / 0.030
G11     118.7          35.0               11.5 +/-    1.35      18.2 +/-    1.35  0.030 / 0.030
G13     321.2          11.4               -0.5 +/-   18.19      -1.4 +/-   18.19  0.030 / 0.030
G17     200.2          13.6                9.5 +/-    3.06      24.3 +/-    3.06  0.110 / 0.350
G18     104.1          16.4               10.6 +/-    1.48      25.5 +/-    1.48  0.210 / 0.290
G28     275.6          52.7               10.7 +/-    3.75      13.1 +/-    3.75  0.100 / 0.090
G30     332.1          59.9                9.9 +/-    0.79      11.2 +/-    0.79  0.080 / 0.100