PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-14:57:40
G02     230.2          67.2                6.8 +/-    0.62       7.3 +/-    0.62  0.130 / 0.390
G05     175.4          10.7               -3.1 +/-   27.49      -8.6 +/-   27.49  0.200 / 0.490
G06     42.3           61.8                7.9 +/-    0.61       8.8 +/-    0.61  0.040 / 0.050
G12     322.2          50.9                6.3 +/-    1.16       7.9 +/-    1.16  0.030 / 0.050
G17     68.0           23.7                8.0 +/-    1.09      16.2 +/-    1.09  0.070 / 0.090
G24     247.1          37.1                8.8 +/-    0.81      13.5 +/-    0.81  0.060 / 0.120
G25     315.7          10.4              -17.6 +/-   17.82     -48.7 +/-   17.82  0.030 / 0.040