PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-18:42:40
G02     66.3           29.1                9.7 +/-    2.31      17.2 +/-    2.31  0.040 / 0.040
G05     48.6           53.6               10.2 +/-    1.14      12.3 +/-    1.14  0.040 / 0.040
G12     180.3          18.9               20.2 +/-    1.55      45.6 +/-    1.55  0.080 / 0.160
G13     118.6          22.5               14.9 +/-    1.98      30.9 +/-    1.98  0.130 / 0.160
G21     280.4          23.8               12.1 +/-    1.06      24.2 +/-    1.06  0.110 / 0.100
G25     220.8          42.5               14.2 +/-    1.62      19.8 +/-    1.62  0.090 / 0.080
G29     335.1          64.7               10.3 +/-    0.48      11.2 +/-    0.48  0.060 / 0.090