PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-02:13:10
G01     40.6           15.5                2.9 +/-    1.08       7.1 +/-    1.08  0.050 / 0.080
G02     198.7          10.9                0.1 +/-    7.77       0.3 +/-    7.77  0.060 / 0.070
G06     176.2          39.2                7.1 +/-    0.96      10.5 +/-    0.96  0.030 / 0.040
G13     237.4          21.2                6.4 +/-    3.20      13.6 +/-    3.20  0.020 / 0.030
G15     269.1          12.0                5.8 +/-    1.53      15.4 +/-    1.53  0.060 / 0.080
G17     358.5          70.7                4.5 +/-    0.80       4.7 +/-    0.80  0.050 / 0.080
G19     281.9          69.8                3.9 +/-    0.82       4.1 +/-    0.82  0.120 / 0.300
G24     316.4          19.6                4.1 +/-    2.09       9.2 +/-    2.09  0.110 / 0.270
G28     73.9           45.8                3.9 +/-    0.91       5.1 +/-    0.91  0.150 / 0.330
G30     153.8          22.9                6.8 +/-    1.92      14.0 +/-    1.92  0.180 / 0.370