PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-00:12:30
G02     211.4          55.8               17.0 +/-    1.00      20.1 +/-    1.00  0.050 / 0.120
G06     78.1           78.4               13.1 +/-    0.45      13.3 +/-    0.45  0.060 / 0.110
G12     316.6          30.8               12.3 +/-    0.91      21.2 +/-    0.91  0.110 / 0.370
G17     49.7           39.7               11.7 +/-    0.73      17.0 +/-    0.73  0.130 / 0.380
G19     31.4           53.5               13.2 +/-    0.44      15.9 +/-    0.44  0.070 / 0.080
G24     273.3          42.4               12.1 +/-    1.55      17.0 +/-    1.55  0.060 / 0.090
G28     118.9          17.5               17.2 +/-    1.71      40.3 +/-    1.71  0.040 / 0.050