PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-22:43:00
G03     185.6          10.4                9.2 +/-    1.23      25.6 +/-    1.23  0.040 / 0.080
G07     301.5          43.5                9.0 +/-    0.42      12.4 +/-    0.42  0.050 / 0.080
G08     134.2          36.7               10.5 +/-    1.46      16.1 +/-    1.46  0.040 / 0.070
G09     313.7          72.9                6.1 +/-    0.60       6.4 +/-    0.60  0.040 / 0.070
G16     41.6           30.1               -1.8 +/-    0.55      -3.1 +/-    0.55  0.060 / 0.180
G23     138.9          68.0                7.9 +/-    0.67       8.5 +/-    0.67  0.050 / 0.150
G27     84.3           36.6                8.0 +/-    0.63      12.3 +/-    0.63  0.150 / 0.450
G30     283.6          22.3                7.4 +/-    1.58      15.5 +/-    1.58  0.160 / 0.320