PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-13:12:50
G01     232.8          23.9                6.3 +/-    2.64      12.6 +/-    2.64  0.180 / 0.310
G03     300.5          66.4                7.4 +/-    1.11       8.0 +/-    1.11  0.180 / 0.140
G14     78.1           29.3                7.7 +/-    1.95      13.6 +/-    1.95  0.080 / 0.150
G16     156.9          33.1                7.9 +/-    0.93      13.0 +/-    0.93  0.140 / 0.130
G18     207.0          12.6                3.9 +/-    2.99      10.4 +/-    2.99  0.120 / 0.160
G22     227.9          75.8                7.8 +/-    0.64       8.0 +/-    0.64  0.200 / 0.190
G23     300.3          31.0                7.8 +/-    1.92      13.3 +/-    1.92  0.040 / 0.040
G26     118.7          50.7               10.0 +/-    1.30      12.5 +/-    1.30  0.050 / 0.050
G31     42.2           41.4                6.1 +/-    1.06       8.7 +/-    1.06  0.030 / 0.030
G32     90.0           16.0                7.3 +/-    1.87      17.8 +/-    1.87  0.030 / 0.030