PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-09:57:20
G02     259.5          80.4                5.9 +/-    0.43       6.0 +/-    0.43  0.100 / 0.110
G05     170.7          19.3                6.4 +/-    1.53      14.4 +/-    1.53  0.100 / 0.100
G06     38.7           60.4                5.4 +/-    0.75       6.1 +/-    0.75  0.030 / 0.040
G12     321.0          54.2                5.2 +/-    0.44       6.2 +/-    0.44  0.040 / 0.040
G17     74.9           19.2                4.5 +/-    1.15      10.0 +/-    1.15  0.040 / 0.030
G19     62.1           35.2                4.9 +/-    0.89       7.8 +/-    0.89  0.030 / 0.020
G24     242.8          32.8                8.7 +/-    1.92      14.3 +/-    1.92  0.360 / 0.240
G25     317.4          15.9                4.0 +/-    1.79       9.7 +/-    1.79  0.310 / 0.290