PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/28-18:42:30
G10     281.3          45.8               10.4 +/-    1.14      13.8 +/-    1.14  0.090 / 0.180
G15     51.0           41.8                7.1 +/-    0.95      10.0 +/-    0.95  0.100 / 0.180
G20     323.6          64.4                8.9 +/-    0.54       9.7 +/-    0.54  0.040 / 0.040
G21     50.7           76.7                9.2 +/-    0.64       9.4 +/-    0.64  0.040 / 0.040
G24     106.1          21.1                8.6 +/-    1.23      18.4 +/-    1.23  0.100 / 0.170
G27     312.6          26.3                9.1 +/-    1.37      17.4 +/-    1.37  0.090 / 0.150
G29     168.3          18.7                8.7 +/-    1.07      19.9 +/-    1.07  0.040 / 0.050
G32     206.5          20.7               11.3 +/-    3.56      24.4 +/-    3.56  0.040 / 0.070