PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/05-21:42:50
G01     94.8           30.7               16.8 +/-    1.09      29.0 +/-    1.09  0.070 / 0.150
G07     121.5          49.4               15.7 +/-    0.52      20.0 +/-    0.52  0.070 / 0.130
G11     75.8           42.3               13.9 +/-    0.81      19.5 +/-    0.81  0.060 / 0.110
G13     299.3          34.3               10.8 +/-    1.62      17.4 +/-    1.62  0.080 / 0.090
G17     212.7          45.5               16.1 +/-    0.98      21.6 +/-    0.98  0.030 / 0.040
G18     68.5           24.7               12.2 +/-    1.77      23.9 +/-    1.77  0.030 / 0.040
G19     213.0          23.0               20.0 +/-    2.03      41.0 +/-    2.03  0.040 / 0.030
G28     342.3          61.9               12.3 +/-    0.72      13.8 +/-    0.72  0.030 / 0.030
G30     94.6           76.4               15.0 +/-    0.31      15.3 +/-    0.31  0.040 / 0.050