PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-17:57:50
G01     40.8           15.8               10.0 +/-    1.99      24.5 +/-    1.99  0.150 / 0.370
G06     173.3          41.3               14.1 +/-    1.13      20.1 +/-    1.13  0.120 / 0.290
G13     236.9          21.5               13.3 +/-    2.39      28.2 +/-    2.39  0.060 / 0.120
G15     272.0          11.7               11.9 +/-    3.19      32.0 +/-    3.19  0.070 / 0.130
G17     0.4            70.4               12.4 +/-    0.67      13.0 +/-    0.67  0.140 / 0.320
G19     274.7          67.4               11.3 +/-    0.79      12.1 +/-    0.79  0.130 / 0.300
G24     316.0          20.7               12.1 +/-    3.52      26.2 +/-    3.52  0.040 / 0.070
G28     72.7           46.5               11.8 +/-    0.78      15.5 +/-    0.78  0.040 / 0.080
G30     155.0          27.1               13.6 +/-    1.47      25.4 +/-    1.47  0.040 / 0.040