PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-13:43:00
G02     205.3          40.3                8.8 +/-    1.35      12.7 +/-    1.35  0.120 / 0.230
G06     152.4          74.4                9.9 +/-    1.02      10.2 +/-    1.02  0.180 / 0.210
G12     310.9          19.6                6.2 +/-    1.22      13.8 +/-    1.22  0.070 / 0.090
G17     43.8           42.7                6.2 +/-    0.47       8.6 +/-    0.47  0.060 / 0.070
G19     17.2           60.3                6.8 +/-    0.67       7.7 +/-    0.67  0.100 / 0.170
G24     292.8          39.7                5.8 +/-    1.48       8.5 +/-    1.48  0.100 / 0.160
G28     108.7          26.5               11.2 +/-    1.15      21.2 +/-    1.15  0.030 / 0.030