PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-14:27:50
G01     67.7           32.3                8.8 +/-    1.37      14.8 +/-    1.37  0.120 / 0.280
G07     138.5          25.8                6.0 +/-    2.38      11.6 +/-    2.38  0.100 / 0.290
G11     51.2           26.4                5.8 +/-    1.71      11.0 +/-    1.71  0.050 / 0.120
G13     273.9          36.5                9.0 +/-    1.76      13.9 +/-    1.76  0.050 / 0.110
G15     302.9          14.7                4.6 +/-    3.05      11.4 +/-    3.05  0.050 / 0.090
G17     240.9          73.9                8.5 +/-    0.40       8.8 +/-    0.40  0.050 / 0.090
G19     226.3          46.3                9.0 +/-    2.45      12.0 +/-    2.45  0.030 / 0.030
G28     24.1           58.5                9.3 +/-    2.81      10.7 +/-    2.81  0.030 / 0.040
G30     137.1          61.7                7.3 +/-    0.75       8.2 +/-    0.75  0.070 / 0.060