PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-09:12:30
G10     246.6          22.9                4.2 +/-    1.77       8.6 +/-    1.77  0.110 / 0.340
G13     58.7           32.9                4.4 +/-    1.51       7.3 +/-    1.51  0.150 / 0.290
G15     93.8           57.1                5.6 +/-    1.26       6.6 +/-    1.26  0.030 / 0.050
G16     301.1          15.0                0.9 +/-    1.67       2.3 +/-    1.67  0.030 / 0.030
G20     30.2           60.9                3.2 +/-    1.08       3.6 +/-    1.08  0.040 / 0.050
G21     329.6          57.9                3.5 +/-    0.67       4.0 +/-    0.67  0.050 / 0.040
G26     272.0          17.4                5.6 +/-    2.12      13.2 +/-    2.12  0.060 / 0.130
G29     162.9          54.4                5.9 +/-    0.65       7.1 +/-    0.65  0.080 / 0.140