PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-07:42:10
G02     46.1           43.7                6.4 +/-    2.40       8.8 +/-    2.40  0.030 / 0.020
G05     102.6          68.9                8.3 +/-    0.62       8.8 +/-    0.62  0.030 / 0.030
G12     191.9          54.5                7.2 +/-    0.52       8.6 +/-    0.52  0.090 / 0.130
G20     203.2          34.4                6.5 +/-    1.38      10.4 +/-    1.38  0.060 / 0.110
G25     274.4          57.9                8.8 +/-    3.27      10.1 +/-    3.27  0.030 / 0.040
G29     316.9          39.3                2.4 +/-    0.88       3.6 +/-    0.88  0.040 / 0.040