PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-13:12:30
G02     202.6          21.5                4.0 +/-    2.38       8.4 +/-    2.38  0.070 / 0.100
G06     166.4          60.2                5.0 +/-    0.92       5.7 +/-    0.92  0.080 / 0.100
G12     303.3          11.6               -2.9 +/-   11.17      -7.8 +/-   11.17  0.170 / 0.210
G17     28.8           54.8                3.0 +/-    0.90       3.6 +/-    0.90  0.270 / 0.320
G19     322.4          69.5                3.3 +/-    0.49       3.5 +/-    0.49  0.220 / 0.300
G24     304.7          34.9                2.7 +/-    1.15       4.2 +/-    1.15  0.250 / 0.430
G28     92.7           37.6                5.6 +/-    0.96       8.5 +/-    0.96  0.050 / 0.080
G30     158.1          11.5                4.4 +/-    2.96      11.9 +/-    2.96  0.050 / 0.090