PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-14:28:00
G02     48.2           42.1                6.1 +/-    0.80       8.5 +/-    0.80  0.030 / 0.020
G05     99.5           70.2                8.6 +/-    0.52       9.1 +/-    0.52  0.020 / 0.020
G12     190.4          50.3               10.8 +/-    0.51      13.6 +/-    0.51  0.130 / 0.350
G20     202.3          42.1               10.9 +/-    0.79      15.3 +/-    0.79  0.180 / 0.320
G21     260.5          11.0               -3.5 +/-   11.73      -9.6 +/-   11.73  0.030 / 0.040
G25     263.2          58.7                8.2 +/-    2.08       9.4 +/-    2.08  0.030 / 0.040
G29     322.2          46.2                6.6 +/-    0.56       8.8 +/-    0.56  0.060 / 0.070