PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-19:28:10
G05     48.2           19.8                7.8 +/-    1.93      17.1 +/-    1.93  0.040 / 0.070
G10     235.9          12.3                4.9 +/-   21.69      12.9 +/-   21.69  0.050 / 0.070
G13     76.0           36.2               10.2 +/-    0.66      15.8 +/-    0.66  0.150 / 0.410
G15     133.5          51.1                9.0 +/-    0.46      11.2 +/-    0.46  0.180 / 0.380
G16     314.0          12.6                6.6 +/-    1.79      17.3 +/-    1.79  0.250 / 0.210
G20     247.7          36.5                9.8 +/-    1.82      15.1 +/-    1.82  0.200 / 0.150
G21     312.9          46.7                8.6 +/-    1.15      11.2 +/-    1.15  0.190 / 0.410
G25     197.8          10.2                8.9 +/-    2.56      24.7 +/-    2.56  0.180 / 0.360
G26     287.7          20.4                9.8 +/-    0.72      21.3 +/-    0.72  0.070 / 0.070
G29     155.0          73.5               10.2 +/-    0.73      10.6 +/-    0.73  0.070 / 0.090