PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-06:27:40
G02     62.7           29.2                3.2 +/-    1.18       5.6 +/-    1.18  0.070 / 0.090
G05     54.1           57.4                4.8 +/-    0.41       5.6 +/-    0.41  0.090 / 0.110
G12     185.3          30.9                6.0 +/-    1.71      10.2 +/-    1.71  0.290 / 0.360
G13     126.9          16.8                7.7 +/-    2.87      18.3 +/-    2.87  0.230 / 0.280
G15     161.4          14.6                5.8 +/-    1.39      14.5 +/-    1.39  0.030 / 0.030
G20     214.3          49.9                6.8 +/-    0.96       8.5 +/-    0.96  0.030 / 0.030
G21     273.6          19.7                5.2 +/-    2.12      11.5 +/-    2.12  0.050 / 0.060
G25     234.9          50.3                5.5 +/-    3.45       7.0 +/-    3.45  0.040 / 0.060
G29     330.4          57.4                4.0 +/-    0.66       4.6 +/-    0.66  0.070 / 0.090