PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-12:13:20
G02     201.9          19.6                5.5 +/-    2.13      12.1 +/-    2.13  0.120 / 0.090
G06     168.3          57.1                5.6 +/-    0.52       6.6 +/-    0.52  0.090 / 0.120
G13     225.3          11.6                4.0 +/-    1.35      10.9 +/-    1.35  0.260 / 0.300
G17     26.6           56.6                4.7 +/-    0.93       5.6 +/-    0.93  0.140 / 0.150
G19     315.5          69.9                4.7 +/-    0.65       4.9 +/-    0.65  0.320 / 0.490
G24     306.7          33.5                3.1 +/-    1.44       5.0 +/-    1.44  0.210 / 0.590
G28     89.7           39.3                4.9 +/-    1.03       7.2 +/-    1.03  0.030 / 0.030
G30     158.0          14.0                4.6 +/-    1.40      11.7 +/-    1.40  0.040 / 0.030