PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-13:27:50
G01     231.8          23.0                6.3 +/-    2.58      12.8 +/-    2.58  0.150 / 0.190
G03     298.5          67.2                7.6 +/-    1.04       8.2 +/-    1.04  0.110 / 0.220
G14     79.3           28.5                6.5 +/-    1.93      11.7 +/-    1.93  0.080 / 0.120
G16     156.4          34.3                9.0 +/-    1.09      14.5 +/-    1.09  0.090 / 0.150
G18     206.3          11.7                5.1 +/-    3.33      13.8 +/-    3.33  0.130 / 0.280
G22     220.6          75.0                7.8 +/-    0.55       8.0 +/-    0.55  0.100 / 0.270
G23     301.2          31.7                7.3 +/-    2.17      12.3 +/-    2.17  0.050 / 0.040
G26     117.0          51.4                9.5 +/-    0.36      11.7 +/-    0.36  0.040 / 0.040
G31     42.5           40.4                6.3 +/-    1.35       9.1 +/-    1.35  0.030 / 0.030
G32     90.7           15.9                6.4 +/-    1.95      15.5 +/-    1.95  0.030 / 0.030