PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-02:28:00
G01     46.7           22.7                4.1 +/-    1.77       8.4 +/-    1.77  0.040 / 0.060
G06     178.4          28.1                6.1 +/-    2.15      11.1 +/-    2.15  0.050 / 0.050
G11     44.5           13.7                3.4 +/-    1.89       8.8 +/-    1.89  0.020 / 0.020
G13     246.8          27.8                5.4 +/-    2.08       9.9 +/-    2.08  0.020 / 0.030
G15     278.6          15.1                2.0 +/-    3.93       5.0 +/-    3.93  0.080 / 0.130
G17     327.8          76.9                5.4 +/-    0.45       5.6 +/-    0.45  0.080 / 0.130
G19     255.7          63.9                5.6 +/-    0.83       6.1 +/-    0.83  0.080 / 0.180
G24     318.9          11.1               -8.9 +/-   28.95     -24.3 +/-   28.95  0.090 / 0.260
G28     60.0           50.6                4.5 +/-    0.64       5.6 +/-    0.64  0.130 / 0.320
G30     150.5          32.6                7.6 +/-    2.17      12.6 +/-    2.17  0.100 / 0.280