PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-05:42:50
G10     264.6          36.5                7.3 +/-    1.27      11.2 +/-    1.27  0.120 / 0.340
G13     43.1           20.3                4.3 +/-    1.11       9.4 +/-    1.11  0.140 / 0.340
G15     61.6           50.3                6.8 +/-    1.07       8.5 +/-    1.07  0.110 / 0.170
G16     280.5          12.8                5.2 +/-    1.72      13.7 +/-    1.72  0.100 / 0.120
G20     348.5          68.7                5.5 +/-    0.74       5.9 +/-    0.74  0.070 / 0.100
G21     356.7          70.3                6.1 +/-    0.55       6.4 +/-    0.55  0.080 / 0.090
G24     122.1          12.9                5.0 +/-    1.28      13.1 +/-    1.28  0.100 / 0.350
G27     319.4          17.4                5.2 +/-    1.32      12.1 +/-    1.32  0.090 / 0.320
G29     168.0          34.0                6.6 +/-    1.18      10.6 +/-    1.18  0.040 / 0.050