PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-17:27:50
G02     37.5           51.8               10.5 +/-    0.50      13.0 +/-    0.50  0.030 / 0.030
G05     124.5          68.4               10.6 +/-    0.87      11.3 +/-    0.87  0.030 / 0.030
G12     186.7          54.6               12.6 +/-    0.84      15.1 +/-    0.84  0.040 / 0.050
G25     276.9          59.0               10.4 +/-    0.61      12.0 +/-    0.61  0.030 / 0.050
G29     313.4          34.4                7.7 +/-    1.28      12.4 +/-    1.28  0.040 / 0.050