PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-16:58:00
G02     37.3           51.9                7.8 +/-    0.48       9.6 +/-    0.48  0.030 / 0.070
G05     127.3          68.0                9.4 +/-    0.47      10.1 +/-    0.47  0.030 / 0.040
G12     187.4          55.6               10.9 +/-    2.08      12.9 +/-    2.08  0.050 / 0.050
G25     277.7          59.0                9.2 +/-    1.19      10.5 +/-    1.19  0.060 / 0.070
G29     313.0          34.0                6.4 +/-    0.85      10.3 +/-    0.85  0.030 / 0.060