PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-15:58:00
G02     231.9          69.4                8.8 +/-    0.42       9.3 +/-    0.42  0.190 / 0.450
G05     173.8          12.6                9.9 +/-    2.71      26.0 +/-    2.71  0.220 / 0.290
G06     42.1           59.3                9.2 +/-    0.44      10.5 +/-    0.44  0.070 / 0.100
G12     323.1          54.0                8.5 +/-    0.45      10.2 +/-    0.45  0.110 / 0.080
G17     69.1           22.5                7.9 +/-    1.89      16.5 +/-    1.89  0.040 / 0.040
G19     50.2           43.9                9.1 +/-    1.06      12.5 +/-    1.06  0.040 / 0.060
G24     246.6          36.6                9.9 +/-    1.05      15.2 +/-    1.05  0.030 / 0.030