PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-12:57:30
G01     224.0          15.6                5.0 +/-    5.72      12.4 +/-    5.72  0.030 / 0.030
G03     269.2          72.4                6.3 +/-    0.31       6.6 +/-    0.31  0.040 / 0.030
G14     88.5           22.3                4.1 +/-    2.11       8.6 +/-    2.11  0.410 / 0.310
G16     148.6          45.1                7.1 +/-    1.12       9.5 +/-    1.12  0.170 / 0.270
G22     201.7          66.5                6.2 +/-    0.56       6.7 +/-    0.56  0.040 / 0.040
G23     309.2          39.3                5.0 +/-    1.08       7.3 +/-    1.08  0.030 / 0.030
G26     97.4           55.2                7.2 +/-    0.58       8.6 +/-    0.58  0.120 / 0.190
G31     46.1           30.7                4.2 +/-    1.58       7.2 +/-    1.58  0.110 / 0.190