PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-21:57:40
G10     247.9          23.5               20.4 +/-    1.59      41.2 +/-    1.59  0.030 / 0.030
G13     58.0           33.1               18.0 +/-    1.13      29.6 +/-    1.13  0.040 / 0.040
G15     94.3           57.9               19.7 +/-    0.39      22.9 +/-    0.39  0.080 / 0.090
G16     301.7          14.1               13.6 +/-    2.03      34.6 +/-    2.03  0.090 / 0.090
G18     264.4          53.8               18.0 +/-    2.42      21.7 +/-    2.42  0.030 / 0.030
G20     40.9           50.7               17.3 +/-    0.54      21.6 +/-    0.54  0.030 / 0.040
G21     330.8          58.8               17.6 +/-    0.76      20.2 +/-    0.76  0.100 / 0.260
G26     274.1          16.4               17.1 +/-    1.78      41.2 +/-    1.78  0.180 / 0.380
G29     162.3          49.7               21.1 +/-    0.43      26.7 +/-    0.43  0.040 / 0.040