PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-13:57:50
G02     205.1          39.5               10.7 +/-    1.43      15.7 +/-    1.43  0.070 / 0.080
G06     153.4          73.9               11.4 +/-    1.07      11.8 +/-    1.07  0.070 / 0.080
G12     310.6          19.2                8.5 +/-    1.40      19.1 +/-    1.40  0.140 / 0.160
G17     43.3           43.1                8.0 +/-    0.39      11.0 +/-    0.39  0.120 / 0.170
G19     16.2           60.6                8.2 +/-    0.58       9.3 +/-    0.58  0.030 / 0.030
G24     293.5          39.4                7.1 +/-    0.86      10.5 +/-    0.86  0.030 / 0.030
G28     108.2          26.9               10.0 +/-    1.54      18.7 +/-    1.54  0.040 / 0.060