PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/13-13:57:30
G02     38.8           50.7                5.4 +/-    0.89       6.7 +/-    0.89  0.030 / 0.030
G05     133.3          65.5                8.1 +/-    1.22       8.9 +/-    1.22  0.030 / 0.040
G06     55.7           15.4                4.5 +/-    1.10      11.1 +/-    1.10  0.020 / 0.060
G12     197.1          63.2                7.8 +/-    1.17       8.7 +/-    1.17  0.040 / 0.040
G20     199.7          30.1                7.4 +/-    1.17      13.0 +/-    1.17  0.070 / 0.150
G25     287.4          56.9                6.9 +/-    0.94       8.1 +/-    0.94  0.090 / 0.150
G29     313.8          36.8                6.3 +/-    1.59       9.6 +/-    1.59  0.110 / 0.310