PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/20-13:12:30
G02     307.5          80.3                3.0 +/-    0.55       3.1 +/-    0.55  0.080 / 0.150
G05     169.7          26.8                4.0 +/-    1.74       7.5 +/-    1.74  0.090 / 0.130
G06     40.7           43.6                1.7 +/-    0.69       2.4 +/-    0.69  0.100 / 0.180
G12     316.2          68.9                1.9 +/-    1.12       2.0 +/-    1.12  0.090 / 0.210
G17     83.7           11.8                5.2 +/-    2.30      13.9 +/-    2.30  0.030 / 0.030
G19     69.0           32.7                4.6 +/-    0.93       7.7 +/-    0.93  0.020 / 0.040
G24     228.1          24.6                4.7 +/-    1.74       9.3 +/-    1.74  0.030 / 0.040
G25     317.2          28.6                1.4 +/-    1.58       2.5 +/-    1.58  0.040 / 0.050