PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-00:13:00
G08     318.4          13.4                7.6 +/-    1.65      19.6 +/-    1.65  0.070 / 0.080
G10     309.0          55.3                9.2 +/-    1.58      11.0 +/-    1.58  0.070 / 0.080
G14     212.5          17.6               11.8 +/-    3.10      27.6 +/-    3.10  0.030 / 0.040
G15     45.8           24.9                7.8 +/-    2.47      15.3 +/-    2.47  0.030 / 0.040
G20     302.1          50.0                7.1 +/-    0.95       8.9 +/-    0.95  0.090 / 0.100
G21     114.6          70.0               10.5 +/-    1.18      11.1 +/-    1.18  0.090 / 0.120
G24     87.4           28.4               10.6 +/-    1.06      19.2 +/-    1.06  0.090 / 0.230
G27     292.1          36.6                7.6 +/-    2.12      11.7 +/-    2.12  0.090 / 0.360
G32     213.8          41.2               11.7 +/-    0.88      16.7 +/-    0.88  0.140 / 0.230