PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-16:12:20
G02     52.2           38.8                6.5 +/-    0.72       9.7 +/-    0.72  0.020 / 0.030
G05     77.1           68.8                8.1 +/-    0.30       8.6 +/-    0.30  0.030 / 0.030
G12     184.7          40.6                9.8 +/-    1.40      14.0 +/-    1.40  0.150 / 0.590
G21     265.2          11.6                7.3 +/-    3.69      19.6 +/-    3.69  0.240 / 0.620
G25     251.6          56.4                8.5 +/-    0.96       9.9 +/-    0.96  0.040 / 0.070
G29     323.0          46.6                6.4 +/-    0.92       8.5 +/-    0.92  0.040 / 0.110