PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-20:13:10
G02     41.5           47.8                7.5 +/-    0.76       9.8 +/-    0.76  0.040 / 0.060
G05     112.0          68.8                9.8 +/-    0.41      10.4 +/-    0.41  0.040 / 0.050
G12     191.5          57.0                9.5 +/-    0.39      11.0 +/-    0.39  0.050 / 0.050
G25     278.5          57.7               15.9 +/-    0.79      18.4 +/-    0.79  0.060 / 0.080
G29     315.2          37.0                7.6 +/-    1.05      11.6 +/-    1.05  0.030 / 0.030