PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-20:27:20
G02     42.2           47.2                9.0 +/-    0.88      11.7 +/-    0.88  0.050 / 0.050
G05     109.4          69.0                9.8 +/-    0.58      10.4 +/-    0.58  0.040 / 0.060
G12     191.2          56.2                9.9 +/-    0.68      11.6 +/-    0.68  0.040 / 0.040
G25     276.8          57.8               11.0 +/-    1.17      12.8 +/-    1.17  0.030 / 0.040
G29     315.8          37.7                8.1 +/-    0.82      12.3 +/-    0.82  0.070 / 0.060