PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-07:28:10
G10     268.2          38.7                5.7 +/-    1.84       8.5 +/-    1.84  0.040 / 0.040
G13     41.5           17.8                3.4 +/-    2.58       8.0 +/-    2.58  0.050 / 0.050
G15     57.4           47.2                4.8 +/-    0.50       6.2 +/-    0.50  0.300 / 0.540
G16     277.7          11.6                4.8 +/-    1.69      13.0 +/-    1.69  0.240 / 0.490
G20     28.1           60.2                5.0 +/-    0.91       5.6 +/-    0.91  0.040 / 0.040
G21     6.4            72.7                4.8 +/-    0.75       5.0 +/-    0.75  0.040 / 0.030
G24     119.5          14.8                5.1 +/-    1.86      12.7 +/-    1.86  0.170 / 0.170
G27     317.8          20.3                2.5 +/-    1.72       5.4 +/-    1.72  0.110 / 0.230
G29     168.2          29.9                5.0 +/-    1.04       8.8 +/-    1.04  0.130 / 0.250
G32     204.2          11.6               -9.3 +/-   25.77     -25.1 +/-   25.77  0.130 / 0.220