PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-16:57:30
G02     37.3           51.9                8.9 +/-    0.66      11.0 +/-    0.66  0.030 / 0.040
G05     127.3          68.0                9.6 +/-    0.59      10.2 +/-    0.59  0.030 / 0.050
G12     187.4          55.6               10.2 +/-    0.56      12.1 +/-    0.56  0.020 / 0.030
G25     277.7          59.0                7.3 +/-    1.34       8.4 +/-    1.34  0.030 / 0.030
G29     313.0          34.0                6.4 +/-    0.88      10.4 +/-    0.88  0.030 / 0.040