PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-17:57:20
G02     36.6           51.9                9.6 +/-    0.42      11.9 +/-    0.42  0.040 / 0.050
G05     126.6          67.0               10.6 +/-    0.37      11.4 +/-    0.37  0.030 / 0.040
G12     192.4          60.8               12.3 +/-    1.17      13.9 +/-    1.17  0.020 / 0.040
G25     286.6          56.3               10.1 +/-    0.60      11.9 +/-    0.60  0.020 / 0.030
G29     311.9          33.1               10.4 +/-    1.14      17.1 +/-    1.14  0.030 / 0.060