PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-05:57:40
G10     245.7          22.2                7.5 +/-    1.80      15.7 +/-    1.80  0.130 / 0.360
G13     59.7           33.2                5.6 +/-    0.95       9.2 +/-    0.95  0.100 / 0.320
G15     97.8           57.5                7.0 +/-    0.93       8.1 +/-    0.93  0.040 / 0.040
G16     301.1          15.4                2.6 +/-    2.13       6.3 +/-    2.13  0.040 / 0.060
G20     310.8          72.5                7.5 +/-    0.42       7.8 +/-    0.42  0.030 / 0.040
G21     326.7          56.1                5.6 +/-    0.54       6.6 +/-    0.54  0.030 / 0.040
G26     272.3          17.8                6.9 +/-    1.52      16.0 +/-    1.52  0.110 / 0.150
G29     163.1          57.0                7.4 +/-    0.52       8.6 +/-    0.52  0.080 / 0.130