PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-03:12:30
G02     55.5           35.4                4.7 +/-    2.30       7.4 +/-    2.30  0.200 / 0.390
G05     66.0           64.2                5.4 +/-    0.58       6.0 +/-    0.58  0.170 / 0.400
G12     187.7          41.0                8.2 +/-    0.63      11.8 +/-    0.63  0.050 / 0.040
G13     131.4          11.3                6.6 +/-    3.04      17.9 +/-    3.04  0.050 / 0.060
G21     267.8          15.4                7.7 +/-    1.79      18.9 +/-    1.79  0.060 / 0.070
G25     243.9          55.4                7.8 +/-    0.82       9.3 +/-    0.82  0.050 / 0.080
G29     328.7          53.6                5.0 +/-    0.54       6.1 +/-    0.54  0.150 / 0.470