PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-13:12:30
G02     202.0          17.8                4.5 +/-    1.98      10.4 +/-    1.98  0.180 / 0.370
G06     168.6          56.1                4.7 +/-    0.80       5.6 +/-    0.80  0.230 / 0.340
G13     226.1          12.4                2.7 +/-   10.55       7.2 +/-   10.55  0.140 / 0.280
G17     25.0           57.8                3.6 +/-    1.08       4.2 +/-    1.08  0.240 / 0.440
G19     310.7          69.8                3.0 +/-    0.64       3.2 +/-    0.64  0.030 / 0.030
G24     307.7          32.4                2.5 +/-    1.19       4.2 +/-    1.19  0.040 / 0.030
G28     88.6           39.8                4.8 +/-    1.19       7.0 +/-    1.19  0.070 / 0.090
G30     157.8          14.9                6.2 +/-    1.74      15.4 +/-    1.74  0.090 / 0.110