PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-16:27:50
G05     48.0           20.3                4.9 +/-    0.60      10.7 +/-    0.60  0.060 / 0.180
G10     235.8          14.1               10.7 +/-    3.08      27.2 +/-    3.08  0.060 / 0.160
G13     74.8           35.2                8.2 +/-    0.63      13.0 +/-    0.63  0.150 / 0.490
G15     122.1          52.6                9.4 +/-    0.37      11.5 +/-    0.37  0.130 / 0.400
G16     313.5          12.9                6.7 +/-    3.14      17.5 +/-    3.14  0.040 / 0.090
G20     249.0          38.8               12.8 +/-    1.42      19.1 +/-    1.42  0.060 / 0.090
G21     313.3          46.4                7.1 +/-    1.38       9.4 +/-    1.38  0.150 / 0.320
G25     199.8          11.9               10.9 +/-    2.19      29.3 +/-    2.19  0.110 / 0.350
G26     287.7          20.1                7.0 +/-    1.72      15.3 +/-    1.72  0.040 / 0.020
G29     153.0          73.8               12.7 +/-    0.86      13.1 +/-    0.86  0.030 / 0.030