PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-16:57:30
G02     242.8          74.2                9.7 +/-    0.45      10.0 +/-    0.45  0.160 / 0.300
G05     171.7          17.1               12.2 +/-    4.59      28.8 +/-    4.59  0.130 / 0.270
G06     40.7           54.5                9.1 +/-    0.55      10.9 +/-    0.55  0.130 / 0.110
G12     322.9          58.6                8.1 +/-    0.93       9.4 +/-    0.93  0.130 / 0.100
G17     72.9           20.1                8.0 +/-    1.54      17.6 +/-    1.54  0.110 / 0.300
G19     55.8           40.7                8.0 +/-    0.71      11.5 +/-    0.71  0.110 / 0.360
G24     241.5          33.7               10.7 +/-    2.69      17.3 +/-    2.69  0.050 / 0.030
G25     316.9          14.4                5.9 +/-    2.19      14.9 +/-    2.19  0.030 / 0.040