PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-13:27:50
G01     239.5          28.3                9.4 +/-    1.67      17.0 +/-    1.67  0.090 / 0.130
G03     310.2          57.3                8.2 +/-    1.57       9.5 +/-    1.57  0.090 / 0.120
G14     69.3           37.2                7.8 +/-    0.95      12.0 +/-    0.95  0.050 / 0.090
G16     156.2          29.9                9.5 +/-    1.17      16.7 +/-    1.17  0.050 / 0.090
G18     213.9          19.0                9.2 +/-    3.03      20.7 +/-    3.03  0.080 / 0.130
G22     257.2          78.0               10.7 +/-    0.97      10.9 +/-    0.97  0.090 / 0.150
G23     297.6          30.5                8.4 +/-    1.32      14.5 +/-    1.32  0.040 / 0.030
G26     120.9          47.1               11.0 +/-    0.61      14.3 +/-    0.61  0.030 / 0.030
G31     41.3           44.9                7.9 +/-    1.07      10.7 +/-    1.07  0.080 / 0.110
G32     87.5           14.5                7.2 +/-    3.11      18.1 +/-    3.11  0.080 / 0.180