PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-16:12:40
G02     52.2           38.8                7.4 +/-    1.60      11.0 +/-    1.60  0.280 / 0.380
G05     77.1           68.8                7.9 +/-    0.44       8.4 +/-    0.44  0.250 / 0.510
G12     184.7          40.6                9.5 +/-    1.59      13.7 +/-    1.59  0.160 / 0.460
G13     132.6          9.8                -6.7 +/-   13.19     -18.7 +/-   13.19  0.030 / 0.030
G21     265.2          11.6                3.1 +/-   18.43       8.3 +/-   18.43  0.020 / 0.020
G25     251.6          56.4                7.5 +/-    2.08       8.8 +/-    2.08  0.060 / 0.080
G29     323.0          46.6                8.3 +/-    0.47      11.0 +/-    0.47  0.050 / 0.070