PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-02:42:20
G02     52.1           38.3                5.4 +/-    0.42       8.1 +/-    0.42  0.040 / 0.060
G05     75.5           66.8                8.0 +/-    0.27       8.6 +/-    0.27  0.040 / 0.070
G12     188.8          45.6               10.2 +/-    1.79      13.6 +/-    1.79  0.240 / 0.520
G21     264.4          12.6                6.6 +/-    9.36      17.5 +/-    9.36  0.200 / 0.530
G25     252.2          57.4                8.7 +/-    1.15      10.1 +/-    1.15  0.040 / 0.050
G29     325.3          49.5                8.9 +/-    1.05      11.3 +/-    1.05  0.040 / 0.040