PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/22-16:28:00
G02     56.2           35.6                7.4 +/-    0.98      11.6 +/-    0.98  0.030 / 0.040
G05     65.3           65.7                8.2 +/-    0.41       8.9 +/-    0.41  0.030 / 0.040
G12     183.9          35.4                9.2 +/-    1.28      14.4 +/-    1.28  0.110 / 0.290
G13     129.0          12.9               10.5 +/-    2.38      27.6 +/-    2.38  0.110 / 0.340
G15     165.4          10.2               -6.0 +/-   25.89     -16.7 +/-   25.89  0.100 / 0.470
G21     269.0          14.6                8.1 +/-    1.18      20.4 +/-    1.18  0.140 / 0.540
G25     242.9          54.1                8.8 +/-    0.69      10.6 +/-    0.69  0.050 / 0.090
G29     326.2          51.0                6.7 +/-    0.91       8.4 +/-    0.91  0.050 / 0.090