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                4.1 +/-    1.38       7.5 +/-    1.38  0.090 / 0.280
G06     180.1          19.5                6.1 +/-    1.43      13.6 +/-    1.43  0.090 / 0.240
G07     145.0          16.5                5.4 +/-    1.31      13.0 +/-    1.31  0.030 / 0.050
G11     46.7           20.8                3.5 +/-    0.98       7.5 +/-    0.98  0.040 / 0.050
G13     255.9          32.4                4.8 +/-    0.83       8.1 +/-    0.83  0.030 / 0.020
G15     286.9          16.5                4.5 +/-    2.22      10.9 +/-    2.22  0.020 / 0.030
G17     284.4          77.9                6.8 +/-    0.88       7.0 +/-    0.88  0.060 / 0.090
G19     241.0          56.9                5.6 +/-    1.09       6.5 +/-    1.09  0.060 / 0.110
G28     47.2           54.1                5.7 +/-    0.59       6.9 +/-    0.59  0.050 / 0.140
G30     146.6          41.3                8.7 +/-    1.26      12.3 +/-    1.26  0.080 / 0.120