PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-19:28:10
G01     120.1          17.2               14.3 +/-    1.16      33.7 +/-    1.16  0.040 / 0.070
G07     76.6           67.5               12.3 +/-    0.31      13.2 +/-    0.31  0.050 / 0.070
G08     46.7           35.8               10.4 +/-    0.62      16.3 +/-    0.62  0.080 / 0.220
G09     177.6          27.7               15.4 +/-    1.92      28.4 +/-    1.92  0.080 / 0.250
G11     110.3          39.4               15.6 +/-    0.45      22.9 +/-    0.45  0.040 / 0.100
G13     318.4          18.2               10.6 +/-    1.25      24.5 +/-    1.25  0.040 / 0.110
G17     202.8          19.5               15.8 +/-    1.54      35.3 +/-    1.54  0.040 / 0.060
G18     96.0           20.4               13.2 +/-    0.79      28.8 +/-    0.79  0.040 / 0.070
G28     291.3          57.1               13.7 +/-    0.62      16.0 +/-    0.62  0.020 / 0.040
G30     348.4          68.8               10.7 +/-    0.96      11.4 +/-    0.96  0.030 / 0.040