PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-16:28:10
G02     51.9           39.1                6.4 +/-    0.84       9.5 +/-    0.84  0.110 / 0.310
G05     77.2           68.7                8.0 +/-    0.34       8.5 +/-    0.34  0.280 / 0.440
G12     184.9          41.0                9.1 +/-    1.30      13.1 +/-    1.30  0.040 / 0.030
G21     265.1          11.5               -0.2 +/-   17.39      -0.6 +/-   17.39  0.030 / 0.030
G25     252.0          56.5                8.1 +/-    1.54       9.5 +/-    1.54  0.050 / 0.080