PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-01:57:40
G02     53.5           37.1                6.8 +/-    0.70      10.4 +/-    0.70  0.060 / 0.060
G05     71.0           65.8                9.4 +/-    0.30      10.2 +/-    0.30  0.070 / 0.060
G12     188.2          43.6               12.6 +/-    1.43      17.4 +/-    1.43  0.060 / 0.100
G21     265.7          13.3               11.7 +/-    2.46      30.3 +/-    2.46  0.060 / 0.080
G25     249.2          56.6               10.1 +/-    1.02      11.9 +/-    1.02  0.220 / 0.440
G29     326.2          50.6                9.3 +/-    1.53      11.6 +/-    1.53  0.200 / 0.330