PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-17:13:00
G02     43.2           47.0               13.1 +/-    0.45      17.1 +/-    0.45  0.060 / 0.050
G05     122.3          69.4               15.3 +/-    0.45      16.2 +/-    0.45  0.050 / 0.050
G12     191.6          55.1               16.1 +/-    1.46      19.2 +/-    1.46  0.060 / 0.070
G20     200.3          38.3               16.8 +/-    0.60      25.1 +/-    0.60  0.060 / 0.050
G25     271.1          59.5               17.2 +/-    0.74      19.6 +/-    0.74  0.030 / 0.040
G29     317.8          41.0               14.7 +/-    1.06      21.0 +/-    1.06  0.030 / 0.040