PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-09:57:30
G02     66.1           26.3                3.8 +/-    1.43       7.1 +/-    1.43  0.030 / 0.030
G05     50.7           54.3                4.2 +/-    0.51       5.0 +/-    0.51  0.030 / 0.030
G12     184.9          27.0                6.8 +/-    0.99      12.6 +/-    0.99  0.090 / 0.120
G13     123.8          19.6                8.3 +/-    2.04      18.3 +/-    2.04  0.090 / 0.150
G15     158.8          18.1                6.0 +/-    2.11      13.9 +/-    2.11  0.080 / 0.110
G20     214.7          62.4                7.4 +/-    1.28       8.2 +/-    1.28  0.100 / 0.120
G21     277.8          23.9                4.4 +/-    1.31       8.8 +/-    1.31  0.180 / 0.180
G25     229.0          47.0                6.3 +/-    2.79       8.3 +/-    2.79  0.210 / 0.150
G29     335.0          63.1                5.9 +/-    0.32       6.5 +/-    0.32  0.050 / 0.040