PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-07:12:20
G02     201.6          27.0                5.8 +/-    2.09      10.8 +/-    2.09  0.070 / 0.070
G06     169.1          60.3                7.0 +/-    1.08       8.0 +/-    1.08  0.070 / 0.090
G17     32.1           52.2                3.8 +/-    0.54       4.7 +/-    0.54  0.040 / 0.040
G19     336.7          69.2                5.7 +/-    0.73       6.1 +/-    0.73  0.040 / 0.040
G24     301.3          37.8                4.6 +/-    0.86       7.0 +/-    0.86  0.050 / 0.080
G28     94.0           37.4                7.1 +/-    0.82      10.8 +/-    0.82  0.050 / 0.100