PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-16:13:00
G02     44.2           46.0                8.3 +/-    0.55      11.0 +/-    0.55  0.020 / 0.030
G05     117.8          69.7                9.3 +/-    0.75       9.9 +/-    0.75  0.020 / 0.040
G12     191.7          54.7               13.5 +/-    2.18      16.1 +/-    2.18  0.060 / 0.100
G20     200.7          38.5               13.4 +/-    1.30      20.1 +/-    1.30  0.050 / 0.110
G25     270.8          59.3               12.3 +/-    0.72      14.0 +/-    0.72  0.060 / 0.060
G29     318.8          42.2                9.1 +/-    1.82      12.8 +/-    1.82  0.060 / 0.040