PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-22:12:40
G01     319.1          18.1                7.1 +/-    1.19      16.4 +/-    1.19  0.040 / 0.040
G08     255.5          13.1                9.8 +/-    2.10      25.5 +/-    2.10  0.050 / 0.040
G10     80.2           52.7                6.8 +/-    1.79       8.3 +/-    1.79  0.250 / 0.250
G11     302.0          23.9                7.8 +/-    2.09      15.7 +/-    2.09  0.200 / 0.280
G14     297.0          70.8                7.2 +/-    0.73       7.6 +/-    0.73  0.070 / 0.130
G18     303.4          42.0                7.7 +/-    1.62      10.8 +/-    1.62  0.080 / 0.140
G20     105.5          29.0               10.5 +/-    2.14      18.8 +/-    2.14  0.140 / 0.270
G31     176.7          41.4               10.8 +/-    1.43      15.4 +/-    1.43  0.130 / 0.270
G32     8.8            67.2                6.5 +/-    0.59       6.9 +/-    0.59  0.040 / 0.070