PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-17:42:30
G02     204.8          32.9               15.0 +/-    1.43      24.7 +/-    1.43  0.060 / 0.090
G06     155.5          71.3               13.6 +/-    0.81      14.2 +/-    0.81  0.050 / 0.080
G12     309.3          17.8               11.6 +/-    0.79      26.8 +/-    0.79  0.100 / 0.160
G17     40.4           45.6                9.1 +/-    0.74      12.2 +/-    0.74  0.100 / 0.160
G19     10.5           62.9               10.4 +/-    0.62      11.5 +/-    0.62  0.040 / 0.060
G24     297.8          37.9               12.1 +/-    0.94      18.2 +/-    0.94  0.030 / 0.060
G28     104.7          29.7               11.4 +/-    0.66      20.1 +/-    0.66  0.030 / 0.040