PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-14:42:50
G08     319.4          12.0                2.6 +/-    4.09       7.0 +/-    4.09  0.050 / 0.060
G10     309.8          55.3               20.4 +/-    1.92      24.3 +/-    1.92  0.040 / 0.050
G14     213.0          19.0                5.8 +/-    2.53      13.1 +/-    2.53  0.030 / 0.030
G15     45.4           19.3                4.8 +/-    2.52      10.8 +/-    2.52  0.030 / 0.040
G18     22.0           62.9                6.2 +/-    1.37       6.9 +/-    1.37  0.080 / 0.080
G20     76.1           16.3                5.9 +/-    2.33      14.3 +/-    2.33  0.090 / 0.100
G21     119.7          64.3                7.3 +/-    0.48       8.0 +/-    0.48  0.160 / 0.200
G24     89.1           29.3                8.0 +/-    1.42      14.2 +/-    1.42  0.110 / 0.230
G27     289.1          37.4                3.5 +/-    1.56       5.2 +/-    1.56  0.580 / 0.580
G32     214.9          40.5                7.5 +/-    1.42      10.8 +/-    1.42  0.360 / 0.470