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                5.8 +/-    0.72      12.8 +/-    0.72  0.060 / 0.170
G10     235.9          12.3                8.8 +/-    3.06      23.3 +/-    3.06  0.070 / 0.170
G13     76.0           36.2                8.3 +/-    0.59      12.9 +/-    0.59  0.050 / 0.100
G15     133.5          51.1                9.8 +/-    1.27      12.2 +/-    1.27  0.050 / 0.090
G16     314.0          12.6                6.0 +/-    1.56      15.9 +/-    1.56  0.110 / 0.420
G20     247.7          36.5                9.0 +/-    1.25      13.9 +/-    1.25  0.120 / 0.450
G21     312.9          46.7                6.6 +/-    0.83       8.7 +/-    0.83  0.060 / 0.130
G25     197.8          10.2                7.6 +/-   15.91      21.2 +/-   15.91  0.070 / 0.130
G26     287.7          20.4                7.1 +/-    2.12      15.4 +/-    2.12  0.250 / 0.470
G29     155.0          73.5               10.5 +/-    0.62      10.9 +/-    0.62  0.280 / 0.560