PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-21:12:30
G05     47.1           21.9                6.1 +/-    1.73      12.8 +/-    1.73  0.110 / 0.240
G13     82.4           36.2                8.3 +/-    0.55      12.8 +/-    0.55  0.270 / 0.270
G15     137.2          47.6                9.6 +/-    0.47      12.5 +/-    0.47  0.040 / 0.070
G16     317.1          11.5                1.5 +/-   17.51       4.0 +/-   17.51  0.080 / 0.070
G20     237.5          -0.0               10.6 +/-    1.68      33.3 +/-    1.68  0.170 / 0.330
G21     307.4          42.7                8.5 +/-    1.06      11.9 +/-    1.06  0.200 / 0.360
G25     201.3          14.7               13.8 +/-    1.78      34.7 +/-    1.78  0.260 / 0.500
G26     291.3          21.2                8.8 +/-    1.13      18.8 +/-    1.13  0.360 / 0.550
G29     149.9          80.0                8.6 +/-    0.37       8.7 +/-    0.37  0.080 / 0.090