PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-02:13:00
G02     35.0           53.4                6.3 +/-    1.42       7.6 +/-    1.42  0.060 / 0.060
G05     133.8          63.5                7.9 +/-    0.52       8.7 +/-    0.52  0.060 / 0.050
G06     53.2           17.5                5.6 +/-    2.09      13.1 +/-    2.09  0.020 / 0.030
G12     203.0          68.5                7.2 +/-    0.95       7.7 +/-    0.95  0.030 / 0.020
G25     293.8          55.1                6.3 +/-    5.84       7.5 +/-    5.84  0.030 / 0.040
G29     310.4          32.9                5.5 +/-    0.91       9.0 +/-    0.91  0.030 / 0.030