PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-06:27:50
G10     301.8          53.1                4.2 +/-    0.96       5.1 +/-    0.96  0.040 / 0.040
G15     45.7           25.5                5.0 +/-    1.98       9.6 +/-    1.98  0.040 / 0.030
G20     41.0           55.9                5.7 +/-    0.71       6.7 +/-    0.71  0.080 / 0.070
G21     104.9          72.5                7.0 +/-    0.59       7.3 +/-    0.59  0.070 / 0.060
G24     93.9           27.6                6.3 +/-    1.41      11.7 +/-    1.41  0.080 / 0.120
G27     296.6          35.6                6.0 +/-    1.98       9.4 +/-    1.98  0.070 / 0.110
G32     211.7          36.8                9.4 +/-    1.43      14.4 +/-    1.43  0.080 / 0.040