PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-16:58:00
G02     35.5           53.3                8.9 +/-    0.47      10.8 +/-    0.47  0.040 / 0.040
G05     131.7          66.8                9.8 +/-    0.54      10.5 +/-    0.54  0.030 / 0.030
G12     188.0          57.6               10.7 +/-    1.16      12.5 +/-    1.16  0.030 / 0.050
G25     281.6          58.5                9.1 +/-    0.79      10.5 +/-    0.79  0.020 / 0.040
G29     311.8          32.5                7.3 +/-    1.19      12.2 +/-    1.19  0.040 / 0.050