PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-16:13:10
G02     239.2          74.4                9.9 +/-    0.46      10.3 +/-    0.46  0.060 / 0.170
G05     175.3          13.1               11.8 +/-    2.21      30.6 +/-    2.21  0.060 / 0.190
G06     40.8           59.3                9.1 +/-    0.37      10.4 +/-    0.37  0.040 / 0.060
G12     321.6          51.9               10.5 +/-    1.12      12.9 +/-    1.12  0.040 / 0.050
G17     72.6           20.0                8.3 +/-    0.72      18.3 +/-    0.72  0.140 / 0.600
G19     59.0           36.9                8.2 +/-    0.60      12.6 +/-    0.60  0.120 / 0.490
G24     247.3          35.1               11.1 +/-    1.13      17.6 +/-    1.13  0.080 / 0.270
G25     316.9          15.4                7.2 +/-    3.24      17.8 +/-    3.24  0.070 / 0.240