PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-13:42:40
G10     296.6          51.3                4.3 +/-    2.70       5.3 +/-    2.70  0.060 / 0.080
G14     210.5          10.8               -6.6 +/-   11.58     -18.2 +/-   11.58  0.110 / 0.080
G15     45.9           26.8                2.8 +/-    2.05       5.3 +/-    2.05  0.320 / 0.460
G20     69.6           22.3                2.5 +/-    2.18       5.3 +/-    2.18  0.030 / 0.040
G21     101.4          71.4                4.5 +/-    0.54       4.7 +/-    0.54  0.030 / 0.030
G24     98.6           26.5                4.6 +/-    1.24       8.7 +/-    1.24  0.060 / 0.160
G27     299.4          34.8                4.6 +/-    1.16       7.3 +/-    1.16  0.100 / 0.140
G32     210.7          32.2                4.9 +/-    1.96       8.3 +/-    1.96  0.090 / 0.100