PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-02:27:50
G01     51.0           26.1                3.8 +/-    1.32       7.3 +/-    1.32  0.030 / 0.060
G06     179.5          22.4                5.4 +/-    2.25      11.2 +/-    2.25  0.040 / 0.060
G07     146.0          13.6                7.8 +/-    2.12      20.0 +/-    2.12  0.030 / 0.030
G11     45.7           18.2                3.0 +/-    0.98       6.9 +/-    0.98  0.020 / 0.030
G13     252.5          30.9                5.8 +/-    1.41      10.0 +/-    1.41  0.080 / 0.170
G15     283.9          16.2                2.8 +/-    2.76       6.8 +/-    2.76  0.090 / 0.160
G17     301.2          78.3                5.1 +/-    1.81       5.2 +/-    1.81  0.080 / 0.130
G19     245.6          59.6                6.0 +/-    0.96       6.8 +/-    0.96  0.070 / 0.120
G28     51.9           52.9                3.5 +/-    0.53       4.3 +/-    0.53  0.130 / 0.250
G30     148.0          37.9                5.1 +/-    1.42       7.7 +/-    1.42  0.150 / 0.220