PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-07:42:50
G10     244.2          22.1                5.4 +/-    2.05      11.4 +/-    2.05  0.040 / 0.030
G13     61.0           32.9                4.5 +/-    1.79       7.4 +/-    1.79  0.040 / 0.040
G15     100.7          57.2                6.2 +/-    0.63       7.3 +/-    0.63  0.060 / 0.100
G16     308.6          12.6                2.2 +/-    2.06       5.7 +/-    2.06  0.060 / 0.120
G20     260.4          45.8                6.4 +/-    2.54       8.5 +/-    2.54  0.130 / 0.120
G21     329.3          57.2                4.3 +/-    0.46       5.0 +/-    0.46  0.070 / 0.110
G26     280.0          17.3                3.8 +/-    1.19       8.9 +/-    1.19  0.210 / 0.350
G29     157.8          53.0                7.1 +/-    0.25       8.7 +/-    0.25  0.120 / 0.340