PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-02:57:30
G02     53.1           37.4                7.5 +/-    1.06      11.4 +/-    1.06  0.160 / 0.280
G05     72.5           66.2                9.5 +/-    0.57      10.3 +/-    0.57  0.140 / 0.250
G12     188.5          44.3               10.9 +/-    0.72      14.8 +/-    0.72  0.060 / 0.070
G21     265.4          13.4               10.7 +/-    3.81      27.5 +/-    3.81  0.060 / 0.060
G25     249.7          56.9               10.1 +/-    2.30      11.8 +/-    2.30  0.080 / 0.060
G29     326.3          50.8                9.0 +/-    1.51      11.2 +/-    1.51  0.070 / 0.040