PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-22:28:00
G10     259.8          32.8               18.2 +/-    1.25      30.0 +/-    1.25  0.130 / 0.440
G13     46.6           25.0               18.4 +/-    1.00      35.9 +/-    1.00  0.140 / 0.540
G15     68.9           53.9               19.7 +/-    0.45      23.7 +/-    0.45  0.040 / 0.050
G16     288.6          13.0               15.6 +/-    1.31      40.8 +/-    1.31  0.050 / 0.050
G18     286.3          61.4               18.2 +/-    0.76      20.5 +/-    0.76  0.070 / 0.190
G20     50.1           39.5               17.6 +/-    0.50      25.8 +/-    0.50  0.070 / 0.220
G21     350.5          68.0               17.9 +/-    1.02      19.2 +/-    1.02  0.070 / 0.090
G26     261.6          11.1               16.2 +/-    2.24      44.2 +/-    2.24  0.070 / 0.100
G27     320.5          14.9               15.5 +/-    2.00      38.7 +/-    2.00  0.160 / 0.440
G29     165.6          34.9               19.5 +/-    1.60      31.1 +/-    1.60  0.140 / 0.370