PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-17:57:40
G01     40.8           15.8               11.1 +/-    2.59      27.1 +/-    2.59  0.170 / 0.230
G06     173.3          41.3               13.5 +/-    1.45      19.3 +/-    1.45  0.200 / 0.220
G13     236.9          21.5               12.4 +/-    1.71      26.2 +/-    1.71  0.060 / 0.130
G15     272.0          11.7               13.5 +/-    3.40      36.2 +/-    3.40  0.070 / 0.120
G17     0.4            70.4               13.5 +/-    0.51      14.3 +/-    0.51  0.210 / 0.290
G19     274.7          67.4               13.5 +/-    0.63      14.5 +/-    0.63  0.360 / 0.430
G24     316.0          20.7               11.1 +/-    3.66      24.0 +/-    3.66  0.030 / 0.030
G28     72.7           46.5               12.4 +/-    0.82      16.4 +/-    0.82  0.030 / 0.030
G30     155.0          27.1               13.0 +/-    1.16      24.1 +/-    1.16  0.030 / 0.040