PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-17:57:30
G01     231.8          22.0                9.6 +/-    2.15      20.1 +/-    2.15  0.030 / 0.040
G03     297.4          66.1                9.0 +/-    0.62       9.8 +/-    0.62  0.030 / 0.020
G14     79.6           29.9                9.5 +/-    3.83      16.7 +/-    3.83  0.120 / 0.140
G16     152.6          38.0               12.8 +/-    0.96      19.2 +/-    0.96  0.110 / 0.160
G22     231.7          75.0                8.3 +/-    1.06       8.5 +/-    1.06  0.070 / 0.080
G23     303.0          33.9                6.8 +/-    1.56      11.1 +/-    1.56  0.070 / 0.080
G26     108.9          52.1               10.9 +/-    0.56      13.4 +/-    0.56  0.060 / 0.110
G31     43.0           37.6                7.5 +/-    1.35      11.3 +/-    1.35  0.040 / 0.060
G32     94.4           9.6                12.0 +/-    2.35      33.8 +/-    2.35  0.120 / 0.210