PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/13-13:57:40
G02     38.8           50.7                5.4 +/-    1.41       6.7 +/-    1.41  0.020 / 0.020
G05     133.3          65.5                7.5 +/-    0.47       8.1 +/-    0.47  0.020 / 0.020
G06     55.7           15.4                4.7 +/-    2.19      11.5 +/-    2.19  0.150 / 0.150
G12     197.1          63.2                6.7 +/-    0.91       7.4 +/-    0.91  0.080 / 0.170
G20     199.7          30.1                7.0 +/-    1.74      12.2 +/-    1.74  0.030 / 0.030
G25     287.4          56.9               10.0 +/-    2.85      11.6 +/-    2.85  0.030 / 0.030
G29     313.8          36.8                4.4 +/-    0.67       6.8 +/-    0.67  0.040 / 0.040