PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-12:27:30
G10     298.5          51.9                4.0 +/-    1.09       4.9 +/-    1.09  0.040 / 0.050
G14     210.9          11.5               -4.3 +/-   17.53     -11.6 +/-   17.53  0.040 / 0.040
G15     45.7           25.8                2.7 +/-    1.27       5.2 +/-    1.27  0.140 / 0.110
G20     70.1           22.3                2.3 +/-    1.90       4.9 +/-    1.90  0.080 / 0.080
G21     103.4          71.4                2.7 +/-    0.65       2.8 +/-    0.65  0.070 / 0.210
G24     97.1           27.0                6.4 +/-    0.83      11.9 +/-    0.83  0.110 / 0.240
G27     298.1          35.3                5.7 +/-    1.13       9.0 +/-    1.13  0.160 / 0.410
G32     211.1          33.8                6.4 +/-    2.21      10.4 +/-    2.21  0.130 / 0.400