PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-02:58:00
G01     42.8           18.5                3.3 +/-    2.21       7.4 +/-    2.21  0.040 / 0.040
G06     177.4          34.3                4.8 +/-    1.57       7.8 +/-    1.57  0.040 / 0.050
G13     241.1          23.9                5.7 +/-    1.60      11.3 +/-    1.60  0.030 / 0.030
G15     272.8          13.4                2.7 +/-    1.36       6.9 +/-    1.36  0.030 / 0.030
G17     350.2          73.3                4.0 +/-    0.57       4.1 +/-    0.57  0.140 / 0.360
G19     270.3          67.9                4.3 +/-    0.89       4.6 +/-    0.89  0.280 / 0.300
G24     317.7          16.2                2.1 +/-    3.61       5.1 +/-    3.61  0.400 / 0.240
G28     68.5           47.8                5.2 +/-    1.43       6.8 +/-    1.43  0.430 / 0.320
G30     152.5          26.3                5.4 +/-    1.38      10.2 +/-    1.38  0.090 / 0.090