PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-10:27:30
G05     46.6           22.9                2.0 +/-    1.21       4.2 +/-    1.21  0.060 / 0.120
G13     87.9           36.4                6.6 +/-    0.58      10.2 +/-    0.58  0.050 / 0.120
G15     133.1          46.5                8.5 +/-    0.84      11.3 +/-    0.84  0.040 / 0.040
G20     358.0          79.0                2.8 +/-    0.69       2.9 +/-    0.69  0.030 / 0.040
G21     307.0          43.7                3.1 +/-    1.15       4.3 +/-    1.15  0.120 / 0.370
G25     204.5          17.9                4.6 +/-    3.20      10.5 +/-    3.20  0.110 / 0.320
G26     296.5          20.2                4.3 +/-    1.22       9.5 +/-    1.22  0.030 / 0.020
G29     142.5          79.9                8.0 +/-    1.21       8.1 +/-    1.21  0.030 / 0.030