PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-05:13:00
G05     47.6           19.3                4.1 +/-    0.87       9.1 +/-    0.87  0.100 / 0.600
G13     82.4           36.6                7.1 +/-    0.94      10.9 +/-    0.94  0.110 / 0.550
G15     130.1          49.1                8.2 +/-    1.59      10.4 +/-    1.59  0.060 / 0.140
G16     317.7          10.9                0.0 +/-   14.19       0.0 +/-   14.19  0.060 / 0.190
G20     258.3          63.7                5.9 +/-    0.66       6.5 +/-    0.66  0.190 / 0.280
G21     308.6          43.9                4.1 +/-    1.10       5.6 +/-    1.10  0.200 / 0.480
G25     202.6          15.0                7.1 +/-    2.68      17.7 +/-    2.68  0.050 / 0.050
G26     291.1          21.0                6.8 +/-    1.89      14.6 +/-    1.89  0.040 / 0.050
G29     150.9          78.2                7.4 +/-    0.66       7.5 +/-    0.66  0.060 / 0.070