PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/25-18:57:40
G05     46.8           24.1                6.7 +/-    0.94      13.3 +/-    0.94  0.190 / 0.420
G13     82.1           36.1                8.9 +/-    0.31      13.8 +/-    0.31  0.190 / 0.410
G15     138.9          47.4                9.8 +/-    1.04      12.8 +/-    1.04  0.130 / 0.510
G16     317.9          10.8               -1.2 +/-   17.37      -3.2 +/-   17.37  0.140 / 0.520
G20     243.6          32.9               10.4 +/-    1.55      17.2 +/-    1.55  0.060 / 0.100
G21     308.7          43.8                7.1 +/-    1.45       9.8 +/-    1.45  0.040 / 0.100
G25     200.0          13.8               10.1 +/-    2.17      25.9 +/-    2.17  0.080 / 0.110
G26     292.6          20.5                8.0 +/-    1.41      17.5 +/-    1.41  0.080 / 0.150
G29     149.1          78.8               11.0 +/-    0.86      11.2 +/-    0.86  0.050 / 0.140