PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-16:42:10
G02     50.9           40.0                6.2 +/-    0.93       8.9 +/-    0.93  0.060 / 0.050
G05     79.9           69.1                6.1 +/-    0.47       6.5 +/-    0.47  0.050 / 0.060
G12     185.3          42.3                8.9 +/-    1.82      12.5 +/-    1.82  0.110 / 0.510
G21     264.2          10.8               -1.7 +/-   21.15      -4.7 +/-   21.15  0.110 / 0.550
G25     254.1          56.9                9.2 +/-    1.26      10.8 +/-    1.26  0.090 / 0.090
G29     322.3          45.7                5.9 +/-    1.82       7.9 +/-    1.82  0.070 / 0.060