PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-23:27:30
G07     309.9          47.8                8.2 +/-    0.78      10.6 +/-    0.78  0.490 / 0.810
G08     126.4          42.5               10.7 +/-    0.62      14.9 +/-    0.62  0.320 / 0.470
G09     295.0          79.9                7.5 +/-    0.32       7.6 +/-    0.32  0.080 / 0.180
G16     42.2           23.6                5.5 +/-    2.22      11.1 +/-    2.22  0.150 / 0.190
G23     146.2          60.3               10.8 +/-    0.60      12.3 +/-    0.60  0.040 / 0.050
G27     74.5           36.7                9.8 +/-    1.02      15.0 +/-    1.02  0.050 / 0.040
G28     225.7          15.6                9.0 +/-   12.14      22.1 +/-   12.14  0.050 / 0.050
G30     289.4          26.6                8.6 +/-    1.35      16.2 +/-    1.35  0.050 / 0.060