PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-02:27:40
G02     52.6           37.9                8.6 +/-    1.17      12.9 +/-    1.17  0.060 / 0.040
G05     73.9           66.5               11.0 +/-    0.53      11.9 +/-    0.53  0.060 / 0.060
G12     188.6          45.0               12.7 +/-    1.05      17.2 +/-    1.05  0.370 / 0.420
G21     264.8          12.8                8.8 +/-    9.17      23.0 +/-    9.17  0.190 / 0.350
G25     251.2          57.1               12.3 +/-    1.35      14.3 +/-    1.35  0.020 / 0.030
G29     325.6          49.9               10.9 +/-    0.92      13.8 +/-    0.92  0.030 / 0.030