PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-03:57:50
G01     66.0           32.2                4.6 +/-    1.25       7.7 +/-    1.25  0.040 / 0.040
G07     139.7          27.2                5.8 +/-    0.72      10.9 +/-    0.72  0.040 / 0.040
G11     52.0           29.0                4.0 +/-    1.74       7.1 +/-    1.74  0.060 / 0.110
G13     270.5          36.5                4.6 +/-    1.34       7.1 +/-    1.34  0.050 / 0.110
G15     298.1          16.4                3.6 +/-    1.32       8.7 +/-    1.32  0.100 / 0.230
G17     242.5          72.4                6.6 +/-    0.34       6.9 +/-    0.34  0.110 / 0.220
G19     227.8          46.7                6.9 +/-    2.42       9.1 +/-    2.42  0.020 / 0.020
G28     28.0           57.9                4.5 +/-    2.05       5.2 +/-    2.05  0.020 / 0.020
G30     138.9          54.4                5.6 +/-    0.62       6.8 +/-    0.62  0.040 / 0.050