PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-07:27:50
G10     282.9          46.1                7.1 +/-    1.35       9.4 +/-    1.35  0.030 / 0.040
G15     49.0           36.9                4.5 +/-    0.70       7.0 +/-    0.70  0.030 / 0.040
G20     39.3           54.8                6.0 +/-    0.81       7.2 +/-    0.81  0.080 / 0.080
G21     52.4           77.3                6.4 +/-    0.41       6.5 +/-    0.41  0.080 / 0.090
G24     108.3          21.8                6.7 +/-    1.13      14.2 +/-    1.13  0.110 / 0.160
G27     309.8          29.0                5.5 +/-    1.10       9.8 +/-    1.10  0.120 / 0.150
G29     168.7          17.5                5.5 +/-    1.26      13.0 +/-    1.26  0.030 / 0.030
G32     206.7          23.3                6.1 +/-    1.68      12.4 +/-    1.68  0.030 / 0.030