PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-23:42:40
G07     309.2          47.5                6.4 +/-    0.86       8.3 +/-    0.86  0.280 / 0.270
G08     126.8          42.1                9.1 +/-    0.51      12.8 +/-    0.51  0.490 / 0.740
G09     297.5          79.5                6.1 +/-    0.56       6.2 +/-    0.56  0.040 / 0.040
G16     42.1           24.4                6.1 +/-    1.78      12.0 +/-    1.78  0.040 / 0.050
G23     145.7          61.1                8.2 +/-    0.41       9.2 +/-    0.41  0.050 / 0.070
G27     75.3           36.8                8.9 +/-    1.11      13.6 +/-    1.11  0.060 / 0.050
G28     225.3          15.1                7.3 +/-   12.29      18.0 +/-   12.29  0.190 / 0.190
G30     288.8          26.0                6.5 +/-    1.52      12.5 +/-    1.52  0.160 / 0.160