PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-09:57:50
G01     88.6           32.1                3.9 +/-    0.76       6.5 +/-    0.76  0.060 / 0.050
G07     126.9          43.5                6.9 +/-    0.70       9.4 +/-    0.70  0.060 / 0.050
G11     65.7           38.4                3.9 +/-    0.70       5.8 +/-    0.70  0.020 / 0.020
G13     292.7          36.7                7.4 +/-    1.68      11.4 +/-    1.68  0.030 / 0.030
G17     215.0          56.9                5.7 +/-    0.93       6.7 +/-    0.93  0.090 / 0.100
G18     60.9           22.8                3.8 +/-    2.52       7.8 +/-    2.52  0.080 / 0.090
G19     215.5          24.2                6.4 +/-    2.63      12.7 +/-    2.63  0.100 / 0.110
G28     349.5          61.7                4.5 +/-    0.47       5.0 +/-    0.47  0.100 / 0.120
G30     105.7          76.8                5.5 +/-    0.55       5.6 +/-    0.55  0.080 / 0.140