PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-13:13:00
G01     227.1          18.6                5.9 +/-    1.65      13.3 +/-    1.65  0.030 / 0.050
G03     283.0          71.1                5.0 +/-    0.86       5.3 +/-    0.86  0.030 / 0.050
G14     84.7           24.9                7.5 +/-    1.41      14.7 +/-    1.41  0.150 / 0.330
G16     152.2          40.6                8.8 +/-    0.81      12.7 +/-    0.81  0.150 / 0.330
G22     207.7          70.3                7.1 +/-    0.82       7.5 +/-    0.82  0.040 / 0.050
G23     305.9          36.1                4.9 +/-    1.15       7.6 +/-    1.15  0.040 / 0.040
G26     106.0          54.2                8.1 +/-    0.40       9.8 +/-    0.40  0.100 / 0.200
G31     44.5           34.6                4.8 +/-    0.92       7.7 +/-    0.92  0.110 / 0.220
G32     95.9           11.3                6.6 +/-    1.97      18.0 +/-    1.97  0.050 / 0.080