PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-17:57:40
G02     239.9          73.7               16.4 +/-    0.54      17.1 +/-    0.54  0.090 / 0.290
G05     174.9          13.8               20.4 +/-    1.25      52.1 +/-    1.25  0.100 / 0.210
G06     40.7           57.7               15.0 +/-    0.75      17.4 +/-    0.75  0.070 / 0.090
G12     321.8          53.5               15.8 +/-    0.82      19.1 +/-    0.82  0.060 / 0.100
G17     73.4           19.4               12.7 +/-    1.19      28.3 +/-    1.19  0.040 / 0.050
G19     59.9           36.4               13.7 +/-    0.51      21.3 +/-    0.51  0.040 / 0.060
G24     246.4          34.7               16.4 +/-    0.97      26.2 +/-    0.97  0.080 / 0.290
G25     317.1          17.2               13.4 +/-    2.21      31.6 +/-    2.21  0.070 / 0.320