PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-07:57:50
G01     68.8           32.6                5.1 +/-    0.99       8.5 +/-    0.99  0.030 / 0.040
G07     138.3          28.6                8.0 +/-    0.95      14.4 +/-    0.95  0.040 / 0.050
G11     52.7           29.0                5.3 +/-    1.56       9.5 +/-    1.56  0.060 / 0.090
G13     274.2          36.8                5.7 +/-    2.02       8.7 +/-    2.02  0.080 / 0.110
G15     301.0          15.8                1.3 +/-    2.18       3.1 +/-    2.18  0.120 / 0.310
G17     238.2          72.2                7.9 +/-    0.47       8.2 +/-    0.47  0.090 / 0.250
G19     225.7          45.1                6.8 +/-    2.69       9.1 +/-    2.69  0.020 / 0.030
G28     23.7           58.6                5.6 +/-    2.96       6.4 +/-    2.96  0.030 / 0.020
G30     136.6          59.6                9.1 +/-    0.35      10.4 +/-    0.35  0.040 / 0.060