PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-17:57:50
G01     228.9          19.4                9.2 +/-    3.82      20.6 +/-    3.82  0.030 / 0.030
G03     289.0          68.8                7.6 +/-    0.71       8.1 +/-    0.71  0.030 / 0.040
G14     82.9           27.7                8.1 +/-    1.33      14.9 +/-    1.33  0.100 / 0.170
G16     150.0          41.7               12.3 +/-    1.19      17.4 +/-    1.19  0.110 / 0.140
G22     219.0          72.7                8.0 +/-    0.64       8.4 +/-    0.64  0.050 / 0.060
G23     305.8          36.5                9.1 +/-    1.62      14.0 +/-    1.62  0.050 / 0.060
G26     102.3          53.3               10.8 +/-    1.15      13.1 +/-    1.15  0.050 / 0.060
G31     44.2           34.3                7.2 +/-    1.12      11.5 +/-    1.12  0.060 / 0.060