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                8.5 +/-    0.95      17.2 +/-    0.95  0.050 / 0.080
G10     1.3            62.9                7.9 +/-    0.90       8.8 +/-    0.90  0.050 / 0.110
G14     228.9          46.7               12.1 +/-    0.82      16.0 +/-    0.82  0.030 / 0.030
G18     60.0           52.9                8.1 +/-    1.01       9.8 +/-    1.01  0.040 / 0.030
G21     145.1          41.6               12.0 +/-    0.90      17.0 +/-    0.90  0.040 / 0.090
G24     59.0           27.4                8.7 +/-    0.82      16.0 +/-    0.82  0.040 / 0.080
G27     254.4          32.3               10.8 +/-    1.03      18.1 +/-    1.03  0.060 / 0.090
G32     242.0          64.6               11.5 +/-    0.80      12.6 +/-    0.80  0.050 / 0.080