PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-02:42:30
G02     46.3           43.4                7.1 +/-    1.45       9.8 +/-    1.45  0.040 / 0.040
G05     96.9           68.9                6.9 +/-    1.28       7.3 +/-    1.28  0.050 / 0.030
G12     191.6          53.8                6.5 +/-    1.22       7.8 +/-    1.22  0.040 / 0.040
G25     267.4          58.9                6.0 +/-    1.72       6.9 +/-    1.72  0.030 / 0.050
G29     320.2          43.5                5.6 +/-    0.78       7.7 +/-    0.78  0.030 / 0.020