PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/11-10:27:50
G01     71.7           32.9                4.9 +/-    1.14       8.0 +/-    1.14  0.060 / 0.120
G07     136.8          30.1                6.6 +/-    1.19      11.5 +/-    1.19  0.080 / 0.110
G11     53.9           29.8                3.5 +/-    0.84       6.1 +/-    0.84  0.050 / 0.110
G13     277.8          36.9                5.9 +/-    0.93       9.1 +/-    0.93  0.060 / 0.090
G15     304.0          15.0                2.0 +/-    2.86       5.0 +/-    2.86  0.050 / 0.050
G17     233.3          70.7                6.7 +/-    0.68       7.1 +/-    0.68  0.050 / 0.060
G19     223.7          43.1                7.3 +/-    1.12      10.2 +/-    1.12  0.030 / 0.030
G28     19.0           59.2                4.5 +/-    0.38       5.2 +/-    0.38  0.030 / 0.030
G30     133.7          63.4                6.3 +/-    0.76       6.9 +/-    0.76  0.100 / 0.320