PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-02:12:50
G01     52.1           26.8                3.1 +/-    2.19       5.9 +/-    2.19  0.040 / 0.060
G06     179.7          21.3                6.8 +/-    2.54      14.6 +/-    2.54  0.040 / 0.040
G07     145.6          14.8                5.9 +/-    1.77      14.8 +/-    1.77  0.030 / 0.020
G11     46.1           19.3                3.7 +/-    2.63       8.3 +/-    2.63  0.020 / 0.020
G13     253.8          31.5                5.4 +/-    3.82       9.1 +/-    3.82  0.130 / 0.190
G15     285.1          16.3                6.5 +/-    1.36      15.7 +/-    1.36  0.130 / 0.210
G17     293.9          78.2                6.0 +/-    0.39       6.2 +/-    0.39  0.150 / 0.180
G19     243.7          58.5                5.7 +/-    1.24       6.5 +/-    1.24  0.090 / 0.180
G28     50.0           53.4                5.1 +/-    1.03       6.2 +/-    1.03  0.160 / 0.230
G30     147.5          39.5                7.8 +/-    0.73      11.5 +/-    0.73  0.280 / 0.310