PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-06:27:40
G10     293.7          50.4                3.8 +/-    1.08       4.8 +/-    1.08  0.050 / 0.090
G15     46.5           30.3                2.5 +/-    1.20       4.4 +/-    1.20  0.050 / 0.080
G20     35.3           57.9                3.6 +/-    0.41       4.2 +/-    0.41  0.070 / 0.120
G21     86.7           75.7                4.3 +/-    0.54       4.4 +/-    0.54  0.060 / 0.130
G24     99.9           25.5                5.8 +/-    1.15      11.2 +/-    1.15  0.040 / 0.050
G27     302.6          33.4                4.4 +/-    1.15       7.2 +/-    1.15  0.040 / 0.040
G29     168.5          10.2                4.9 +/-    2.24      13.5 +/-    2.24  0.050 / 0.040
G32     209.3          31.3                4.8 +/-    2.29       8.1 +/-    2.29  0.040 / 0.050