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                4.6 +/-    1.28       5.4 +/-    1.28  0.100 / 0.440
G06     89.7           80.4                1.7 +/-    0.95       1.7 +/-    0.95  0.140 / 0.430
G12     316.3          29.6                4.7 +/-    1.30       8.3 +/-    1.30  0.040 / 0.070
G17     51.9           37.2                2.6 +/-    1.00       3.9 +/-    1.00  0.050 / 0.080
G19     33.1           52.6                3.6 +/-    0.66       4.4 +/-    0.66  0.030 / 0.020
G24     274.3          42.1                1.7 +/-    1.14       2.4 +/-    1.14  0.030 / 0.040
G28     119.0          17.2                6.9 +/-    1.43      16.2 +/-    1.43  0.080 / 0.120