PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-02:27:30
G02     52.6           37.9                7.6 +/-    0.70      11.5 +/-    0.70  0.210 / 0.450
G05     73.9           66.5               10.6 +/-    0.33      11.4 +/-    0.33  0.230 / 0.410
G12     188.6          45.0               12.2 +/-    1.69      16.4 +/-    1.69  0.040 / 0.070
G21     264.8          12.8               10.1 +/-    5.35      26.5 +/-    5.35  0.050 / 0.060
G25     251.2          57.1               10.8 +/-    1.58      12.6 +/-    1.58  0.030 / 0.030
G29     325.6          49.9               11.9 +/-    0.94      15.1 +/-    0.94  0.030 / 0.040