PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-06:12:40
G02     56.0           34.9                3.5 +/-    1.82       5.6 +/-    1.82  0.050 / 0.060
G05     66.7           64.3                5.6 +/-    0.34       6.2 +/-    0.34  0.050 / 0.060
G12     187.2          40.0                6.8 +/-    1.62       9.8 +/-    1.62  0.060 / 0.070
G13     133.3          11.1                7.1 +/-    4.99      19.4 +/-    4.99  0.060 / 0.080
G20     209.7          41.6                7.2 +/-    1.02      10.2 +/-    1.02  0.110 / 0.420
G21     266.8          14.5                4.2 +/-    1.71      10.5 +/-    1.71  0.130 / 0.390
G25     248.5          55.4                5.5 +/-    1.96       6.5 +/-    1.96  0.030 / 0.030
G29     324.8          49.4                4.0 +/-    0.82       5.1 +/-    0.82  0.030 / 0.030