PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-04:42:50
G02     211.0          56.6                4.4 +/-    0.73       5.1 +/-    0.73  0.110 / 0.190
G06     89.7           80.4                3.5 +/-    0.70       3.5 +/-    0.70  0.120 / 0.230
G12     316.3          29.6                2.4 +/-    2.48       4.2 +/-    2.48  0.030 / 0.020
G17     51.9           37.2                4.2 +/-    1.86       6.4 +/-    1.86  0.040 / 0.020
G19     33.1           52.6                4.2 +/-    1.31       5.2 +/-    1.31  0.050 / 0.060
G24     274.3          42.1                1.7 +/-    2.07       2.3 +/-    2.07  0.040 / 0.050
G28     119.0          17.2                6.0 +/-    1.50      14.2 +/-    1.50  0.110 / 0.120