PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-11:27:30
G01     74.6           33.1                4.8 +/-    0.42       8.0 +/-    0.42  0.030 / 0.030
G07     135.3          32.0                6.7 +/-    0.86      11.3 +/-    0.86  0.030 / 0.040
G11     55.6           31.2                4.0 +/-    1.00       6.9 +/-    1.00  0.040 / 0.090
G13     281.2          36.9                7.5 +/-    0.79      11.5 +/-    0.79  0.040 / 0.100
G15     306.5          14.1                3.4 +/-    1.81       8.7 +/-    1.81  0.040 / 0.040
G17     228.8          68.6                5.5 +/-    0.77       5.9 +/-    0.77  0.040 / 0.040
G19     221.9          40.8                8.1 +/-    1.19      11.7 +/-    1.19  0.220 / 0.260
G28     14.4           59.8                3.8 +/-    0.57       4.3 +/-    0.57  0.040 / 0.070
G30     130.3          66.3                5.1 +/-    0.56       5.5 +/-    0.56  0.090 / 0.220