PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-05:27:40
G10     241.5          19.6                5.1 +/-    3.04      11.4 +/-    3.04  0.040 / 0.040
G13     65.0           34.1                5.0 +/-    1.40       8.1 +/-    1.40  0.040 / 0.050
G15     107.5          56.3                6.9 +/-    0.91       8.1 +/-    0.91  0.070 / 0.130
G16     310.5          12.6                3.6 +/-    3.11       9.5 +/-    3.11  0.080 / 0.120
G20     256.4          43.2                5.4 +/-    2.03       7.5 +/-    2.03  0.210 / 0.410
G21     323.6          53.7                3.8 +/-    0.79       4.6 +/-    0.79  0.210 / 0.360
G26     282.2          18.3                3.5 +/-    1.34       7.9 +/-    1.34  0.100 / 0.280
G29     156.4          58.4                6.8 +/-    0.71       7.9 +/-    0.71  0.160 / 0.320