PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-01:57:00
G02     44.4           45.1                6.9 +/-    1.71       9.3 +/-    1.71  0.030 / 0.030
G05     104.0          68.8                7.9 +/-    0.78       8.4 +/-    0.78  0.030 / 0.040
G12     192.7          56.3               10.2 +/-    0.28      12.0 +/-    0.28  0.050 / 0.030
G25     272.9          58.7                9.1 +/-    1.70      10.4 +/-    1.70  0.040 / 0.040
G29     318.2          41.1                8.2 +/-    1.07      11.6 +/-    1.07  0.030 / 0.020