PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-13:57:40
G01     127.4          11.4                6.4 +/-   25.61      17.4 +/-   25.61  0.030 / 0.030
G07     51.1           69.6                9.7 +/-    0.45      10.3 +/-    0.45  0.030 / 0.030
G08     50.7           39.8                8.8 +/-    0.55      12.8 +/-    0.55  0.140 / 0.370
G09     177.1          35.2                9.2 +/-    0.98      14.6 +/-    0.98  0.110 / 0.380
G11     118.4          35.1               10.8 +/-    0.76      17.1 +/-    0.76  0.050 / 0.090
G13     321.2          11.4                1.1 +/-   21.95       3.1 +/-   21.95  0.050 / 0.070
G17     200.0          14.1                6.5 +/-    2.17      16.5 +/-    2.17  0.030 / 0.030
G18     104.0          16.4                9.1 +/-    1.38      22.0 +/-    1.38  0.030 / 0.040
G28     275.5          52.6                9.4 +/-    0.85      11.4 +/-    0.85  0.040 / 0.080
G30     331.7          59.7                8.1 +/-    0.69       9.2 +/-    0.69  0.060 / 0.060