PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-06:57:50
G10     246.7          23.0                5.7 +/-    1.57      11.7 +/-    1.57  0.110 / 0.270
G13     58.5           32.7                4.9 +/-    1.56       8.1 +/-    1.56  0.080 / 0.280
G15     94.7           57.4                7.4 +/-    0.75       8.6 +/-    0.75  0.040 / 0.040
G16     300.2          15.4                1.3 +/-    2.17       3.2 +/-    2.17  0.030 / 0.040
G20     345.3          73.0                5.3 +/-    0.39       5.5 +/-    0.39  0.040 / 0.050
G21     328.5          57.1                4.5 +/-    0.51       5.3 +/-    0.51  0.040 / 0.040
G26     271.3          17.4                4.2 +/-    2.16       9.9 +/-    2.16  0.040 / 0.020
G29     163.4          55.3                6.6 +/-    0.57       7.8 +/-    0.57  0.040 / 0.020