PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-16:42:30
G02     51.3           40.5                7.2 +/-    1.16      10.3 +/-    1.16  0.040 / 0.060
G05     79.6           69.7                8.1 +/-    0.21       8.5 +/-    0.21  0.050 / 0.050
G12     184.2          39.1                9.3 +/-    2.19      13.8 +/-    2.19  0.050 / 0.080
G21     265.5          12.8                5.3 +/-    5.85      14.0 +/-    5.85  0.050 / 0.090
G25     244.6          56.4                8.8 +/-    0.59      10.4 +/-    0.59  0.220 / 0.510
G29     323.1          46.9                7.0 +/-    0.96       9.2 +/-    0.96  0.200 / 0.440