PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-14:42:30
G02     205.3          39.0               12.4 +/-    1.48      18.4 +/-    1.48  0.120 / 0.170
G06     151.9          74.1                9.4 +/-    1.15       9.7 +/-    1.15  0.110 / 0.200
G12     310.7          19.4                7.4 +/-    1.29      16.6 +/-    1.29  0.070 / 0.080
G17     43.4           43.0                7.8 +/-    0.66      10.8 +/-    0.66  0.070 / 0.090
G19     16.4           60.6                7.8 +/-    0.34       8.8 +/-    0.34  0.030 / 0.040
G24     293.6          39.4                6.9 +/-    1.13      10.2 +/-    1.13  0.030 / 0.030
G28     108.2          27.0                9.3 +/-    1.58      17.4 +/-    1.58  0.040 / 0.060