PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-05:57:50
G05     50.8           11.8                1.4 +/-    1.75       3.6 +/-    1.75  0.080 / 0.290
G10     239.1          15.4                6.8 +/-    2.77      16.8 +/-    2.77  0.090 / 0.300
G13     70.5           36.1                3.9 +/-    0.75       6.1 +/-    0.75  0.110 / 0.200
G15     115.6          54.8                5.3 +/-    0.47       6.4 +/-    0.47  0.190 / 0.240
G16     309.9          13.9                2.4 +/-    1.46       6.0 +/-    1.46  0.050 / 0.050
G20     287.6          72.0                5.6 +/-    0.74       5.8 +/-    0.74  0.060 / 0.060
G21     317.4          50.0                4.4 +/-    0.76       5.5 +/-    0.76  0.100 / 0.160
G26     281.7          20.2                4.6 +/-    1.04      10.0 +/-    1.04  0.130 / 0.180
G29     159.0          67.5                4.7 +/-    1.06       5.1 +/-    1.06  0.030 / 0.040