PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-17:42:40
G07     27.5           69.3               15.1 +/-    0.68      16.1 +/-    0.68  0.040 / 0.060
G08     59.7           47.5               14.2 +/-    1.05      18.4 +/-    1.05  0.040 / 0.050
G09     179.4          44.7               17.8 +/-    0.88      24.0 +/-    0.88  0.030 / 0.040
G11     127.2          30.3               18.2 +/-    1.64      31.7 +/-    1.64  0.040 / 0.040
G18     111.1          12.6               16.7 +/-    2.47      44.0 +/-    2.47  0.020 / 0.030
G23     158.8          10.8               18.8 +/-    3.47      51.7 +/-    3.47  0.030 / 0.030
G27     38.7           13.1                9.7 +/-    2.66      25.2 +/-    2.66  0.190 / 0.330
G28     265.3          48.7               16.0 +/-    4.19      20.6 +/-    4.19  0.120 / 0.320
G30     325.8          55.1               14.4 +/-    0.62      17.1 +/-    0.62  0.210 / 0.420