PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-13:27:40
G08     306.4          19.5                4.4 +/-    1.62       9.8 +/-    1.62  0.080 / 0.080
G10     342.8          61.4                3.7 +/-    0.31       4.1 +/-    0.31  0.050 / 0.070
G14     221.8          34.8                5.5 +/-    3.32       8.8 +/-    3.32  0.030 / 0.050
G21     139.2          49.0                6.4 +/-    0.43       8.2 +/-    0.43  0.030 / 0.040
G24     68.0           29.6                4.2 +/-    1.14       7.5 +/-    1.14  0.130 / 0.180
G27     266.0          36.1                7.0 +/-    1.41      10.8 +/-    1.41  0.110 / 0.120
G32     229.6          58.7                5.5 +/-    1.90       6.4 +/-    1.90  0.060 / 0.110