PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-12:42:40
G01     58.9           29.9                5.0 +/-    1.40       8.7 +/-    1.40  0.030 / 0.020
G06     180.5          15.4                6.2 +/-    1.41      15.4 +/-    1.41  0.020 / 0.020
G11     47.3           20.9                3.1 +/-    2.66       6.6 +/-    2.66  0.060 / 0.110
G13     263.9          34.5                6.8 +/-    2.08      10.9 +/-    2.08  0.060 / 0.130
G15     294.4          16.1                5.3 +/-    1.77      12.9 +/-    1.77  0.040 / 0.040
G17     272.5          79.1                3.8 +/-    0.69       3.8 +/-    0.69  0.030 / 0.030
G19     234.5          53.7                4.8 +/-    2.07       5.8 +/-    2.07  0.050 / 0.080
G28     38.1           56.1                5.0 +/-    1.05       5.8 +/-    1.05  0.050 / 0.090
G30     144.1          52.8                4.6 +/-    0.44       5.6 +/-    0.44  0.130 / 0.280