PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-02:12:30
G08     293.3          23.4                8.1 +/-    1.22      16.4 +/-    1.22  0.080 / 0.080
G10     1.3            62.9                8.2 +/-    0.81       9.1 +/-    0.81  0.080 / 0.120
G14     228.9          46.7               12.9 +/-    2.06      17.0 +/-    2.06  0.040 / 0.030
G18     60.0           52.9                8.2 +/-    0.40      10.0 +/-    0.40  0.040 / 0.030
G21     145.1          41.6               10.8 +/-    0.94      15.3 +/-    0.94  0.040 / 0.080
G24     59.0           27.4                8.8 +/-    1.36      16.4 +/-    1.36  0.070 / 0.070
G27     254.4          32.3               10.3 +/-    2.54      17.3 +/-    2.54  0.110 / 0.120
G32     242.0          64.6                9.8 +/-    0.73      10.7 +/-    0.73  0.100 / 0.070