PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-14:12:40
G01     69.2           32.5                9.6 +/-    0.60      16.0 +/-    0.60  0.030 / 0.030
G07     137.9          27.1               10.9 +/-    1.11      20.3 +/-    1.11  0.030 / 0.040
G11     52.0           27.4                7.2 +/-    1.25      13.4 +/-    1.25  0.050 / 0.120
G13     275.5          36.7                9.8 +/-    1.51      15.1 +/-    1.51  0.040 / 0.110
G15     303.9          14.5                3.4 +/-    3.37       8.5 +/-    3.37  0.080 / 0.140
G17     237.7          72.8               10.4 +/-    0.82      10.8 +/-    0.82  0.090 / 0.130
G19     225.3          45.1               13.7 +/-    1.92      18.4 +/-    1.92  0.050 / 0.090
G28     21.9           58.8                9.6 +/-    0.53      11.0 +/-    0.53  0.050 / 0.080
G30     135.7          62.9               10.5 +/-    0.79      11.6 +/-    0.79  0.030 / 0.040