PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-08:58:10
G10     246.0          22.3                7.6 +/-    1.56      15.8 +/-    1.56  0.110 / 0.360
G13     59.5           33.2                4.9 +/-    0.86       8.1 +/-    0.86  0.090 / 0.320
G15     95.5           57.1                7.6 +/-    0.88       8.8 +/-    0.88  0.070 / 0.040
G16     301.8          15.0                4.3 +/-    2.13      10.6 +/-    2.13  0.060 / 0.040
G20     27.0           63.1                4.4 +/-    0.45       4.9 +/-    0.45  0.050 / 0.040
G21     328.6          57.3                6.1 +/-    0.42       7.1 +/-    0.42  0.030 / 0.050
G26     272.7          17.6                7.0 +/-    1.17      16.3 +/-    1.17  0.070 / 0.100
G29     162.7          55.4                9.3 +/-    0.56      11.0 +/-    0.56  0.060 / 0.110