PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/09-17:13:00
G02     52.6           38.8                9.5 +/-    0.54      14.0 +/-    0.54  0.270 / 0.650
G05     72.7           67.6               10.9 +/-    0.53      11.7 +/-    0.53  0.230 / 0.700
G12     185.0          39.8               14.0 +/-    1.89      20.4 +/-    1.89  0.040 / 0.060
G21     266.1          12.3                8.3 +/-   15.14      22.0 +/-   15.14  0.040 / 0.060
G25     249.5          55.9               10.7 +/-    0.68      12.7 +/-    0.68  0.030 / 0.030
G29     324.0          47.9                9.2 +/-    1.21      11.9 +/-    1.21  0.030 / 0.040