PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-03:57:50
G05     49.1           15.4                3.5 +/-    1.94       8.6 +/-    1.94  0.080 / 0.080
G10     236.3          12.3               11.3 +/-    2.59      29.9 +/-    2.59  0.050 / 0.090
G13     75.8           36.5                7.1 +/-    0.94      11.0 +/-    0.94  0.110 / 0.300
G15     124.0          52.4                9.5 +/-    0.85      11.6 +/-    0.85  0.100 / 0.330
G16     313.3          12.9                6.9 +/-    2.58      18.1 +/-    2.58  0.100 / 0.290
G20     256.5          55.3               10.3 +/-    0.85      12.3 +/-    0.85  0.110 / 0.380
G21     312.9          46.8                7.1 +/-    1.25       9.3 +/-    1.25  0.180 / 0.310
G26     285.8          20.8                8.4 +/-    2.25      18.1 +/-    2.25  0.120 / 0.350
G29     156.4          72.9                9.8 +/-    1.50      10.2 +/-    1.50  0.070 / 0.110