PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-17:43:00
G02     51.8           40.4                6.9 +/-    0.94      10.0 +/-    0.94  0.250 / 0.360
G05     74.6           68.4                7.8 +/-    0.38       8.3 +/-    0.38  0.130 / 0.320
G12     183.5          37.2                9.4 +/-    0.63      14.3 +/-    0.63  0.060 / 0.080
G13     132.7          10.9                6.0 +/-   15.41      16.6 +/-   15.41  0.060 / 0.070
G21     266.3          13.2                7.4 +/-    5.35      19.2 +/-    5.35  0.030 / 0.030
G25     243.4          55.8                9.0 +/-    1.30      10.7 +/-    1.30  0.020 / 0.030
G29     323.7          47.8                7.1 +/-    0.41       9.3 +/-    0.41  0.040 / 0.050