PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-21:43:00
G10     248.4          24.0               18.5 +/-    1.80      36.9 +/-    1.80  0.110 / 0.360
G13     57.3           32.8               15.5 +/-    0.93      25.6 +/-    0.93  0.120 / 0.380
G15     92.7           57.9               18.8 +/-    0.54      21.7 +/-    0.54  0.040 / 0.050
G16     301.3          14.1               13.2 +/-    1.59      33.6 +/-    1.59  0.040 / 0.050
G18     265.3          54.3               17.5 +/-    0.85      21.0 +/-    0.85  0.110 / 0.370
G20     41.3           50.3               14.9 +/-    0.44      18.7 +/-    0.44  0.100 / 0.310
G21     331.8          59.3               16.4 +/-    0.89      18.7 +/-    0.89  0.060 / 0.150
G26     273.7          16.2               16.1 +/-    1.66      38.8 +/-    1.66  0.060 / 0.140
G29     162.4          48.9               20.1 +/-    1.44      25.8 +/-    1.44  0.040 / 0.060