PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-06:27:30
G10     296.3          51.3                4.9 +/-    1.98       6.1 +/-    1.98  0.060 / 0.080
G15     46.2           28.7                4.8 +/-    1.58       8.7 +/-    1.58  0.070 / 0.070
G20     37.2           57.2                6.5 +/-    1.05       7.5 +/-    1.05  0.040 / 0.040
G21     93.5           74.8                7.7 +/-    0.50       7.9 +/-    0.50  0.040 / 0.040
G24     97.9           26.3                7.1 +/-    1.28      13.4 +/-    1.28  0.100 / 0.130
G27     300.7          34.2                4.0 +/-    1.62       6.4 +/-    1.62  0.080 / 0.100
G32     210.1          33.1                6.9 +/-    2.23      11.3 +/-    2.23  0.080 / 0.070