PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-11:42:50
G01     256.5          37.5                7.1 +/-    1.97      10.8 +/-    1.97  0.040 / 0.070
G03     316.5          41.3                5.7 +/-    0.67       8.1 +/-    0.67  0.040 / 0.070
G11     242.1          14.8                6.4 +/-    1.28      15.9 +/-    1.28  0.030 / 0.030
G14     51.5           47.1                4.9 +/-    0.81       6.4 +/-    0.81  0.040 / 0.030
G18     225.1          31.2                5.8 +/-    2.62      10.0 +/-    2.62  0.060 / 0.080
G22     307.5          67.0                7.0 +/-    1.02       7.5 +/-    1.02  0.050 / 0.080
G25     43.6           12.9                3.3 +/-    2.41       8.7 +/-    2.41  0.060 / 0.080
G26     137.8          35.1               -0.0 +/-   20.44      -0.1 +/-   20.44  0.060 / 0.060
G31     42.7           60.6                5.9 +/-    0.56       6.6 +/-    0.56  0.110 / 0.430
G32     74.5           24.1                5.1 +/-    1.35      10.3 +/-    1.35  0.110 / 0.400