PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-13:27:30
G01     223.6          15.2                7.0 +/-    3.82      17.3 +/-    3.82  0.200 / 0.330
G03     265.5          72.8               10.6 +/-    0.51      11.0 +/-    0.51  0.190 / 0.370
G14     89.0           21.9                8.2 +/-    2.41      17.3 +/-    2.41  0.040 / 0.040
G16     148.5          45.5               10.2 +/-    1.90      13.7 +/-    1.90  0.040 / 0.040
G22     199.8          65.6               10.1 +/-    0.68      11.0 +/-    0.68  0.050 / 0.030
G23     309.5          39.5                7.7 +/-    0.78      11.3 +/-    0.78  0.040 / 0.030
G26     96.8           55.4                9.1 +/-    0.49      10.8 +/-    0.49  0.040 / 0.050
G31     46.3           30.4                7.0 +/-    1.77      12.1 +/-    1.77  0.040 / 0.050