PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-02:12:50
G01     53.7           27.7                3.2 +/-    2.15       5.8 +/-    2.15  0.040 / 0.040
G06     180.1          19.5                5.8 +/-    3.78      12.9 +/-    3.78  0.050 / 0.050
G07     145.0          16.5                5.3 +/-    2.52      12.8 +/-    2.52  0.090 / 0.140
G11     46.7           20.8                5.1 +/-    2.67      10.9 +/-    2.67  0.100 / 0.160
G13     255.9          32.4                4.1 +/-    2.01       6.8 +/-    2.01  0.020 / 0.020
G15     286.9          16.5                5.4 +/-    1.43      12.9 +/-    1.43  0.030 / 0.030
G17     284.4          77.9                6.8 +/-    0.62       6.9 +/-    0.62  0.090 / 0.110
G19     241.0          56.9                6.4 +/-    3.16       7.5 +/-    3.16  0.090 / 0.110
G28     47.2           54.1                6.4 +/-    1.01       7.7 +/-    1.01  0.070 / 0.150
G30     146.6          41.3                7.5 +/-    0.78      10.7 +/-    0.78  0.140 / 0.150