PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-06:57:40
G10     302.7          53.4                4.9 +/-    0.80       6.0 +/-    0.80  0.220 / 0.540
G14     212.0          11.1               -4.7 +/-   17.72     -12.9 +/-   17.72  0.190 / 0.590
G15     45.7           24.8                3.4 +/-    0.92       6.7 +/-    0.92  0.040 / 0.040
G20     47.0           52.5                4.9 +/-    0.38       6.0 +/-    0.38  0.050 / 0.050
G21     106.7          72.0                6.0 +/-    0.50       6.3 +/-    0.50  0.060 / 0.080
G24     93.3           27.8                6.9 +/-    1.43      12.7 +/-    1.43  0.060 / 0.090
G27     295.8          35.9                5.5 +/-    0.49       8.6 +/-    0.49  0.070 / 0.120
G32     212.0          37.4                6.7 +/-    1.14      10.1 +/-    1.14  0.070 / 0.120