PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-22:43:10
G10     267.1          37.5               17.8 +/-    1.45      27.0 +/-    1.45  0.040 / 0.030
G13     42.5           19.8               17.7 +/-    2.41      39.2 +/-    2.41  0.030 / 0.030
G15     59.5           49.2               19.5 +/-    0.95      24.8 +/-    0.95  0.070 / 0.060
G16     281.8          11.2               16.5 +/-    2.37      44.8 +/-    2.37  0.080 / 0.070
G18     300.9          64.3               18.4 +/-    0.57      20.2 +/-    0.57  0.040 / 0.050
G20     55.1           33.9               18.3 +/-    1.17      29.6 +/-    1.17  0.040 / 0.040
G21     6.5            72.6               19.3 +/-    0.54      20.1 +/-    0.54  0.150 / 0.340
G24     121.3          14.1               23.4 +/-    1.88      59.7 +/-    1.88  0.140 / 0.380
G27     317.6          20.5               17.3 +/-    2.16      37.7 +/-    2.16  0.060 / 0.120
G29     166.6          27.4               20.4 +/-    1.28      37.8 +/-    1.28  0.050 / 0.120