PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-17:42:40
G01     118.8          17.4               11.6 +/-    1.41      27.2 +/-    1.41  0.080 / 0.060
G07     89.6           61.2               11.7 +/-    0.99      13.1 +/-    0.99  0.080 / 0.090
G08     45.0           31.6                9.7 +/-    1.31      16.4 +/-    1.31  0.040 / 0.050
G09     177.7          27.7               10.5 +/-    1.11      19.2 +/-    1.11  0.030 / 0.040
G11     105.7          40.5               12.0 +/-    0.67      17.3 +/-    0.67  0.030 / 0.030
G13     317.5          20.0               10.7 +/-    1.47      23.4 +/-    1.47  0.040 / 0.030
G17     201.0          24.2               12.5 +/-    2.62      24.9 +/-    2.62  0.110 / 0.230
G18     92.5           20.6               11.8 +/-    1.05      25.6 +/-    1.05  0.080 / 0.230
G28     285.2          54.1               11.1 +/-    2.70      13.3 +/-    2.70  0.250 / 0.400
G30     351.0          70.1               10.8 +/-    0.87      11.4 +/-    0.87  0.140 / 0.380