PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-05:57:30
G02     46.5           43.4                5.0 +/-    1.74       7.0 +/-    1.74  0.030 / 0.040
G05     99.7           68.8                7.7 +/-    1.11       8.2 +/-    1.11  0.030 / 0.050
G12     191.1          53.5                8.9 +/-    0.67      10.8 +/-    0.67  0.110 / 0.180
G20     205.0          30.9                7.5 +/-    1.46      12.9 +/-    1.46  0.080 / 0.120
G25     273.3          57.9                4.6 +/-    3.06       5.4 +/-    3.06  0.030 / 0.030
G29     316.9          39.0                3.9 +/-    1.03       5.8 +/-    1.03  0.030 / 0.020