PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-14:57:50
G02     237.3          74.3                9.1 +/-    0.41       9.4 +/-    0.41  0.100 / 0.260
G05     175.0          12.8               13.4 +/-    6.65      35.0 +/-    6.65  0.100 / 0.310
G06     40.9           61.2                6.9 +/-    0.84       7.7 +/-    0.84  0.050 / 0.080
G12     321.5          50.3                9.5 +/-    0.83      12.0 +/-    0.83  0.090 / 0.060
G17     71.7           20.8                8.8 +/-    2.40      19.0 +/-    2.40  0.030 / 0.050
G19     57.9           37.7               10.1 +/-    1.92      15.3 +/-    1.92  0.040 / 0.050
G24     248.4          35.7               10.3 +/-    1.69      16.1 +/-    1.69  0.170 / 0.290
G25     316.7          13.8                5.0 +/-    2.59      12.7 +/-    2.59  0.230 / 0.270