PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-21:58:10
G10     248.3          23.9               18.6 +/-    1.75      37.3 +/-    1.75  0.140 / 0.380
G13     57.5           32.9               16.7 +/-    0.78      27.5 +/-    0.78  0.110 / 0.350
G15     93.3           57.9               19.4 +/-    0.33      22.5 +/-    0.33  0.030 / 0.060
G16     301.3          14.1               13.6 +/-    2.33      34.5 +/-    2.33  0.040 / 0.050
G18     265.0          54.1               19.1 +/-    1.04      23.0 +/-    1.04  0.050 / 0.120
G20     41.2           50.3               15.6 +/-    0.41      19.6 +/-    0.41  0.050 / 0.140
G21     331.4          59.1               17.2 +/-    0.48      19.7 +/-    0.48  0.050 / 0.070
G26     273.6          16.2               16.7 +/-    1.89      40.2 +/-    1.89  0.040 / 0.070
G29     162.4          49.2               20.2 +/-    1.62      25.8 +/-    1.62  0.140 / 0.320