PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-13:28:00
G01     227.6          19.1                6.9 +/-    2.82      15.5 +/-    2.82  0.040 / 0.040
G03     284.5          71.0                6.4 +/-    0.82       6.7 +/-    0.82  0.040 / 0.030
G14     84.2           25.2                9.1 +/-    1.01      17.7 +/-    1.01  0.160 / 0.360
G16     152.9          39.9                9.0 +/-    1.52      13.1 +/-    1.52  0.160 / 0.350
G22     208.2          70.8                9.0 +/-    1.08       9.4 +/-    1.08  0.040 / 0.050
G23     305.3          35.6                6.6 +/-    1.12      10.3 +/-    1.12  0.030 / 0.050
G26     107.4          54.0                9.1 +/-    0.38      10.9 +/-    0.38  0.100 / 0.180
G31     44.2           35.3                6.9 +/-    0.97      11.0 +/-    0.97  0.090 / 0.210
G32     95.3           11.9                7.9 +/-    1.19      21.2 +/-    1.19  0.060 / 0.080