PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/08-14:57:50
G02     315.1          81.3                7.4 +/-    0.77       7.5 +/-    0.77  0.070 / 0.170
G05     169.3          26.5                9.1 +/-    1.45      17.2 +/-    1.45  0.070 / 0.190
G06     40.2           46.8                5.8 +/-    0.70       7.7 +/-    0.70  0.020 / 0.040
G12     317.1          65.4                5.1 +/-    1.32       5.5 +/-    1.32  0.030 / 0.040
G17     83.5           12.2                9.1 +/-    2.12      24.2 +/-    2.12  0.130 / 0.160
G19     71.9           28.7                7.3 +/-    0.60      13.1 +/-    0.60  0.110 / 0.180
G24     234.0          26.6               10.0 +/-    2.18      18.8 +/-    2.18  0.060 / 0.100
G25     317.7          26.6                5.5 +/-    0.93      10.4 +/-    0.93  0.050 / 0.100