PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-14:58:00
G02     205.1          38.2               12.3 +/-    1.20      18.5 +/-    1.20  0.160 / 0.170
G06     152.9          73.6               12.4 +/-    0.96      12.9 +/-    0.96  0.110 / 0.180
G12     310.4          19.0                9.8 +/-    0.98      22.1 +/-    0.98  0.060 / 0.090
G17     42.9           43.5               10.7 +/-    0.59      14.8 +/-    0.59  0.070 / 0.080
G19     15.4           61.0               11.7 +/-    0.35      13.1 +/-    0.35  0.030 / 0.030
G24     294.3          39.2               10.6 +/-    0.97      15.6 +/-    0.97  0.030 / 0.030
G28     107.6          27.4               10.9 +/-    1.93      20.1 +/-    1.93  0.030 / 0.060