PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-17:12:40
G02     43.2           47.0               13.2 +/-    0.90      17.3 +/-    0.90  0.040 / 0.040
G05     122.3          69.4               15.1 +/-    0.68      16.0 +/-    0.68  0.060 / 0.050
G12     191.6          55.1               15.7 +/-    0.46      18.6 +/-    0.46  0.040 / 0.040
G20     200.3          38.3               15.6 +/-    0.91      23.3 +/-    0.91  0.040 / 0.040
G25     271.1          59.5               14.3 +/-    1.16      16.3 +/-    1.16  0.040 / 0.020
G29     317.8          41.0               13.1 +/-    0.76      18.7 +/-    0.76  0.040 / 0.020