PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-08:27:40
G01     123.8          14.2                5.5 +/-    1.74      13.9 +/-    1.74  0.020 / 0.030
G07     67.2           68.2                6.6 +/-    0.32       7.0 +/-    0.32  0.030 / 0.030
G08     46.8           34.3                4.7 +/-    0.82       7.6 +/-    0.82  0.040 / 0.030
G09     173.7          26.8                5.1 +/-    0.96       9.6 +/-    0.96  0.030 / 0.030
G11     112.0          37.7                7.8 +/-    0.94      11.8 +/-    0.94  0.140 / 0.280
G13     319.8          15.3                2.2 +/-    2.53       5.4 +/-    2.53  0.150 / 0.280
G17     199.8          20.5                4.6 +/-    1.64       9.9 +/-    1.64  0.180 / 0.370
G18     98.3           18.5                5.6 +/-    1.27      12.8 +/-    1.27  0.130 / 0.260
G28     281.3          54.2                4.2 +/-    2.69       5.1 +/-    2.69  0.100 / 0.220
G30     335.3          62.6                4.6 +/-    0.52       5.1 +/-    0.52  0.100 / 0.210