PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-02:42:30
G02     52.1           38.3                6.7 +/-    1.35      10.0 +/-    1.35  0.230 / 0.470
G05     75.5           66.8                7.9 +/-    0.64       8.5 +/-    0.64  0.290 / 0.390
G12     188.8          45.6               10.5 +/-    0.92      14.0 +/-    0.92  0.050 / 0.050
G21     264.4          12.6                7.8 +/-    8.70      20.5 +/-    8.70  0.050 / 0.050
G25     252.2          57.4                8.9 +/-    1.47      10.3 +/-    1.47  0.040 / 0.060
G29     325.3          49.5                7.7 +/-    1.07       9.8 +/-    1.07  0.050 / 0.050