PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-08:42:30
G02     232.0          74.2                5.6 +/-    0.42       5.8 +/-    0.42  0.030 / 0.020
G05     173.4          12.6                3.8 +/-    5.44      10.1 +/-    5.44  0.030 / 0.020
G06     42.0           68.3                4.8 +/-    0.64       5.1 +/-    0.64  0.030 / 0.070
G12     321.0          46.1                5.2 +/-    0.61       6.8 +/-    0.61  0.040 / 0.070
G17     68.1           24.4                5.1 +/-    1.04      10.1 +/-    1.04  0.050 / 0.080
G19     54.0           40.3                3.9 +/-    1.16       5.7 +/-    1.16  0.050 / 0.080
G24     251.4          37.1                5.6 +/-    1.53       8.5 +/-    1.53  0.260 / 0.320