PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-01:57:30
G02     35.5           52.9                8.6 +/-    0.35      10.5 +/-    0.35  0.020 / 0.040
G05     132.5          64.0               10.7 +/-    0.71      11.8 +/-    0.71  0.020 / 0.050
G06     53.6           16.8                6.1 +/-    1.55      14.5 +/-    1.55  0.040 / 0.050
G12     202.1          67.9                9.2 +/-    0.97       9.9 +/-    0.97  0.040 / 0.050
G25     293.0          55.3                7.7 +/-    0.98       9.2 +/-    0.98  0.120 / 0.170
G29     310.8          33.2                7.7 +/-    1.25      12.7 +/-    1.25  0.160 / 0.200