PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/03-16:58:00
G02     42.3           47.8               11.9 +/-    0.38      15.4 +/-    0.38  0.030 / 0.050
G05     125.3          68.8               13.5 +/-    0.51      14.4 +/-    0.51  0.040 / 0.040
G12     192.3          56.6               14.8 +/-    0.81      17.3 +/-    0.81  0.040 / 0.060
G20     200.1          36.9               14.7 +/-    0.99      22.5 +/-    0.99  0.040 / 0.050
G25     274.0          59.3               15.0 +/-    1.62      17.1 +/-    1.62  0.020 / 0.040
G29     317.1          40.2               13.2 +/-    0.82      19.2 +/-    0.82  0.030 / 0.040