PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-15:28:10
G02     76.9           18.7                7.3 +/-    0.68      16.7 +/-    0.68  0.030 / 0.040
G05     44.6           44.3                6.9 +/-    0.40       9.3 +/-    0.40  0.030 / 0.050
G12     178.1          10.2                8.8 +/-    1.04      24.5 +/-    1.04  0.070 / 0.110
G13     106.9          28.3                9.6 +/-    1.10      17.5 +/-    1.10  0.060 / 0.110
G15     149.9          31.4                8.3 +/-    1.38      14.1 +/-    1.38  0.070 / 0.190
G20     229.5          17.8                8.3 +/-    2.77      19.4 +/-    2.77  0.070 / 0.210
G21     289.7          30.0                9.1 +/-    1.45      16.0 +/-    1.45  0.090 / 0.150
G25     215.0          34.3                8.8 +/-    2.03      14.2 +/-    2.03  0.080 / 0.130
G26     312.6          14.8                6.0 +/-    2.70      15.0 +/-    2.70  0.030 / 0.030
G29     345.7          75.6                8.5 +/-    0.43       8.7 +/-    0.43  0.020 / 0.030